Just more error on your part as anyone who is truly familiar with the New Testament ought to know.
In other words, "what else he (Paul) did" IS clearly said, contrary to your most recent erroneous claim.
For example, here is what Paul said in Galatians:
"But when it pleased God, who separated me from my mother's womb, and called me by his grace, To reveal his Son in me, that I might preach him among the heathen; IMMMEDIATELY I conferred not with flesh and blood: Neither went I up to Jerusalem to them which were apostles before me; BUT I WENT INTO ARABIA, AND RETURNED AGAIN UNTO DAMASCUS. Then after three years I went to Jerusalem to see Peter, and abode with him fifteen days." (Gal. 1:15-18)
Paul's time in "Arabia" was immediately after his conversion.
Does the Bible explain this?
It most certainly does.
In fact, Paul explained it himself, when he said:
"IN DAMASCUS the governor UNDER ARETAS THE KING kept the city of the Damascenes with a garrision, desirous to apprehend me: And through a window in a basket was I let down by the wall, and escaped his hands." (II Cor. 11:32-33)
Although we normally view Damascus as a Syrian city, at this point in history, it was actually under the rule of King Aretas, THE KING OF ARABIA.
http://classic.net.bible.org/dictionary.php?word=Aretas
Greek
Strongs #702: Aretav Aretas
Aretes
1) An Arabian king
He made war in 36 A.D. on his son-in-law Herod Antipas for having divorced his daughter; and with such success as completely to destroy his army. In consequence of this, Vitellius, governor of Syria, being ordered by Tiberius to march an army against Aretes, prepared for war. But Tiberius meantime having died, (Mar. 16, 37), he recalled his troops from march, dismissed them to winter quarters, and departed for Rome. After his departure Aretas held sway over the region of Damascus (how acquired we do not know), and placed an ethnarch over the city, who tried to capture Paul.
With such being the case, Paul never had to leave Syria and travel to Arabia (as many teach) as that portion of Syria was presently under Arabian rule.
With this in mind, let's examine Luke's account of what transpired immediately following Paul's conversion and see if it doesn't perfectly match up with what Paul said in Galatians 1:17-18.
"And Saul arose from the earth; and when his eyes were opened, he saw no man: BUT THEY LED HIM BY THE HAND, AND BROUGHT HIM INTO DAMASCUS. And he was three days without sight, and neither did eat nor drink. And there was a certain disciple AT DAMASCUS, named Ananias; and to him said the Lord in a vision, Ananias. And he said, Behold, I am here, Lord. And the Lord said unto him, Arise, and go into the street which is called Straight, and inquire in the house of Judas for one called Saul, of Tarsus: for, behold, he prayeth, And hath seen in a vision a man named Ananias coming in, and putting his hand on him, that he might receive his sight. Then Ananias answered, Lord, I have heard by many of this man, how much evil he hath done to thy saints at Jerusalem: And HERE he hath authority from the chief priests to bind all that call on thy name. But the Lord said unto him, Go thy way: for he is a chosen vessel unto me, to bear my name before the Gentiles, and kings, and the children of Israel: For I will shew him how great things he must suffer for my name's sake. And Ananias went his way, and entered into the house; and putting his hands on him said, Brother Saul, the Lord, even Jesus, that appeared unto thee in the way as thou camest, hath sent me, that thou mightest receive thy sight, and be filled with the Holy Ghost. And immediately there fell from his eyes as it had been scales: and he received sight forthwith, and arose, and was baptized. And when he had received meat, he was strengthened. THEN WAS SAUL CERTAIN DAYS WITH THE DISCIPLES WHICH WERE AT DAMASCUS. AND STRAIGHTWAY HE PREACHED CHRIST IN THE SYNAGOGUES, that he is the Son of God. But all that heard him were amazed, and said; Is not this he that destroyed them which called on this name in Jerusalem, and came hither for that intent, that he might bring them bound unto the chief priests? But Saul increased the more in strength, AND CONFOUNDED THE JEWS WHICH DWELT AT DAMASCUS, proving that this is very Christ. AND AFTER THAT MANY DAYS WERE FULFILLED, the Jews took counsel to kill him: But their lying in wait was known of Saul. And they watched the gates day and night to kill him. THEN THE DISCIPLES TOOK HIM BY NIGHT, AND LET HIM DOWN BY THE WALL IN A BASKET." (Acts 9:8-25)
Okay, what do we have so far?
1. Saul/Paul IMMEDIATELY preached AT DAMASCUS, which was then UNDER THE RULE OF THE KING OF ARABIA.
2. Saul/Paul preached AT DAMASCUS for MANY DAYS ("after that many days were fulfilled").
3. The Jews sought to kill Saul/Paul and he had to be let down by a wall in a basket.
Again, there's no need for some trip into "Arabia" (Paul was already there) where Paul allegedly spent a few years preparing for his ministry, as some teach.
The first people to whom Paul preached, according to his own testimony, were the people at Damascus, and Paul did so “straightway” (Acts 9:20) or immediately after his conversion.
We read:
"Whereupon AS I WENT TO DAMASCUS with authority and commission from the chief priests, At midday, O king, I saw in the way a light from heaven, above the brightness of the sun, shining round about me and them which journeyed with me. And when we were all fallen to the earth, I heard a voice speaking unto me, and saying in the Hebrew tongue, Saul, Saul, why persecutest thou me? it is hard for thee to kick against the pricks. And I said, Who art thou, Lord? And he said, I am Jesus whom thou persecutest. But rise, and stand upon thy feet: for I have appeared unto thee for this purpose, to make thee a minister and a witness both of these things which thou hast seen, and of those things in the which I will appear unto thee; Delivering thee from the people, and from the Gentiles, unto whom now I send thee, To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me. Whereupon, O king Agrippa, I WAS NOT DISOBEDIENT UNTO THE HEAVENLY VISION, BUT SHEWED FIRST UNTO THEM OF DAMASCUS, and at Jerusalem, and throughout all the coasts of Judaea, and then to the Gentiles, that they should repent and turn to God, and do works meet for repentance." (Acts 26:12-20)
Paul was not disobedient to the heavenly vision, but he shewed FIRST UNTO THEM OF DAMASCUS that they should repent and do works meet for repentance.
Again, Paul was preaching at Damascus, which was then under the rule of the Arabian King, Aretas, FOR MANY DAYS (Acts 9:23).
These "many days" are apparently the three years of which he spoke in Galatians.
Going back there, we read:
"Neither went I up to Jerusalem to them which were apostles before me; but I went into Arabia, and returned again unto Damascus. THEN AFTER THREE YEARS I WENT UP TO JERUSALEM TO SEE PETER, AND ABODE WITH HIM FIFTEEN DAYS." (Gal. 1:17-18)
Picking up where I previously left off in Luke's account in Acts, we read:
"And AFTER THAT MANY DAYS WERE FULFILLED, the Jews sought counsel to kill him. But their laying in wait was known of Saul. And they watched the gates day and night to kill him. Then the disciples took him by night, and let him down by the wall in a basket. AND WHEN SAUL WAS COME TO JERUSALEM, he assayed to join himself to the disciples: but they were all afraid of him, and believed not that he was a disciple. BUT BARNABAS TOOK HIM, AND BROUGHT HIM TO THE APOSTLES, and declared unto them how he had seen the Lord in the way, and that he had spoken to him, AND HOW HE HAD PREACHED BOLDLY AT DAMASCUS in the name of Jesus. AND HE WAS WITH THEM COMING IN AND GOING OUT AT JERUSALEM." (Acts 9:23-28)
It matches perfectly:
Preaching AT DAMASCUS, which was then under ARABIAN RULE for "many days" or three years and then GOING TO JERUSALEM.