See
Acts 10:44,
Acts 11:15,
Acts 16: 32 Then they spoke the word of the Lord to him and to all the others in his house. 33 At that hour of the night the jailer took them and washed their wounds; then immediately he and all his household were baptized.
Did you hear that?
They had to hear the message that saves and it is the message that says to repent of your sins.
Acts 10:44-48
The Holy Spirit Falls on the Gentiles
44 While Peter was still speaking these words, the Holy Spirit fell upon all those who heard the word. 45 And those of the circumcision who believed were astonished, as many as came with Peter, because the gift of the Holy Spirit had been poured out on the Gentiles also. 46 For they heard them speak with tongues and magnify God.
Then Peter answered, 47 “Can anyone forbid water, that these should not be baptized who have received the Holy Spirit just as we have?” 48 And he commanded them to be baptized in the name of the Lord. Then they asked him to stay a few days.
Acts 11:15
15 And as I began to speak, the Holy Spirit fell upon them, as upon us at the beginning.
Acts 16:32
32 Then they spoke the word of the Lord to him and to all who were in his house.
So given the above verses which you quote as state the message in said verses is saying we need to repent of our sins, what are those sins?
Because I can't see what you are seeing.
Unless it has to do with baptism.
All of the above verses you quoted either contain baptism or the ones following mention baptism.