Peter and the disciples and gentile believers in the scripture you quoted were already believing and following Gods' Word it says so these scriptures do not support your claims that repentance is not a requirement for receiving God's Spirit and receiving God's forgiveness so are your words above that disagree with God's Word below.
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Proverbs 28:13, He that covers his sins shall not prosper: but whoever confesses and forsakes them shall have mercy
Acts of the Apostles 2:38 [38], Then Peter said to them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and you shall receive the gift of the Holy Ghost.
Acts of the Apostles 3:19 Repent you therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord.
Acts of the Apostles 8:22 Repent therefore of this your wickedness, and pray God, if perhaps the thought of your heart may be forgiven you.
Acts of the Apostles 17:30 And the times of this ignorance God winked at; but now commands all men every where to repent
1 John 2:3-4, [3] And hereby we do know that we know him, if we keep his commandments.[4], He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him
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I prefer Gods' Word over your words.
Hope this is helpful