I haven’t been baptized yet I felt I wasn’t ready after falling into sin again.
Clearly your heart is right; you are willing but your flesh is weak. The enemy would like nothing more than to keep you from obeying what will ultimately be life changing.
Consider Jesus words and how they relate to the gospel message: "Behold, I stand at the door and knock: if any man hear my voice AND open the door I will come IN TO him..." This parallels what happened first at Pentecost. Hearts were pricked. (Jesus knocked) The command to repent and be baptized in the name of Jesus, although spoken by Peter, came directly from Jesus via His Holy Spirit; see Acts 1:2. Those who heard and obeyed were promised they would receive the Holy Ghost.
Although the sequence differs, what has remained the same is getting water baptized in the name of Jesus for remission of ones sin and being filled with the Holy Ghost/Spirit (a separate experience) applies to everyone living in the New Testament era regardless of nationality.
Acts 2:1-4
And when the day of Pentecost was fully come, they were all with one accord in one place.
And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
And there appeared unto them cloven tongues like as of fire, and
it sat upon each of them.
And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance...
MESSAGE FIRST PREACHED TO JEWS:
"Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear...
Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.
Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren,
what shall we do?
What Peter said next applies to all of humanity as confirmed elsewhere in scripture:
"Repent, and
be baptized every one of you
in the name of Jesus Christ for the remission of sin and
you shall receive the gift of the Holy Ghost...Acts 2:36-38 Receiving the Holy Ghost is a promise for all who are willing to hear and obey.
PREACHED TO SAMARITANS: (These individuals did not receive the Holy Ghost until days after believing the gospel and submitting to water baptism in the name of Jesus. Ever wonder how they knew they had not yet received the Holy Ghost? The answer is revealed in other detailed accounts of those who experienced the NT rebirth.
"...when they believed Philip preaching the things concerning the kingdom of God,
and the name of Jesus Christ, they were baptized, both men and women."
Now when the apostles which were at Jerusalem heard that Samaria had received the word of God, they sent unto them Peter and John:
Who, when they were come down, prayed for them, that they might receive the Holy Ghost:
(For as yet he was fallen upon none of them:
only they were baptized in the name of the Lord Jesus.)
Then laid they their hands on them, and they received the Holy Ghost." Acts 8:12, 14-17.
PETER INSTRUCTED THE GENTILES: (they received the Holy Ghost first, and afterward submitted to water baptism in the name of Jesus)
"To him give all the prophets witness, that
through his name whosoever believeth in him shall receive remission of sins.
While Peter yet spake these words, the Holy Ghost fell on all them which heard the word.
And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.
For they heard them speak with tongues, and magnify God. Then answered Peter,
Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we?
And
he commanded them to be baptized in the name of the Lord." Acts 10:43-48
PAUL INSTRUCTED 12 INDIVIDUALS:
Notice Paul's question, "How were you baptized?" He then proceeds to explain the need to be
baptized in the name of the Lord: (This is water baptism as attested to by scriptures elsewhere)
"Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
He said unto them,
Have ye received the Holy Ghost SINCE ye believed? (Paul's question clarifies that receiving the Holy Ghost does not automatically occur upon belief)
And they said unto him, We have not so much as heard whether there be any Holy Ghost.
And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus. When they heard this,
they were baptized in the name of the Lord Jesus." Acts 19:1-5 We know this is referring to being rebaptized in water. How? See the next verse: "And when Paul had laid his hands upon them,
the Holy Ghost came on them; and they spake with tongues, and prophesied." Acts 19:6
Lastly, as scripture reveals individual's knew without a shadow of doubt when they received the Holy Ghost. As noted they spoke in tongues.