The death, buriel, and resurrection of Jesus Christ.
Death=repentance (hating the sinful life that the flesh lives for. Also, remember Paul said, “I die daily”)
Buriel=”buried with Him in baptism unto death”; which Peter made clear to be for the remission of sins.
Resurrection=baptism of the Holy Ghost (”But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.” Rom. 8:11)
Simple..so simple that childlike faith is all it takes to ‘hear the word of God and keep it’.
Obeying the gospel is not our own works. Jesus Christ remits the sins, and has ordained it to take place in baptism in his name. (Acts 2:38; is it from heaven or of men?).
Remember, Peter proclaimed that God has given the Holy Ghost to them that obey him. That is foretold in several places, such as this passage: “He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me is loved of my Father, and I will love him, and will manifest myself to him.” John 14:21. Manifest how? by the infilling of the Holy Ghost.
Where in that gospel does it say that Christ died FOR OUR SINS?
"After these things came Jesus and his disciples into the land of Judea, and there he tarried with them, and baptized." (Jn. 3:22 cf. v. 26, 4:1-2)
What was this baptism? It was not one literal or figurative-literal of regeneration. What was its purpose, and why were not the Eleven rebaptized after Pentecost of 33 AD?
"And the Lord said, 'Simon, Simon, behold; Satan hath desired to have you, that he may sift you as wheat: But I have prayed for me, that thy faith fail not: and when thou art converted, strengthen thy brethren.'"
Peter was not yet converted, let alone regenerated. But it is indicated that he was baptized. It was not John's baptism. I think your interpretation of Acts 2:38 relies too much on the imprecision of the English translations.
The interpretation of that passage hinges (1) the kind of baptism undertaken, and (2) on the preposition "eis" = "for" and is a sort of ticklish proposition. There are seven baptisms in the NT (eight if one includes ritual purification under The Law), each of a different kind, not to be confused. Thayer's Greek-English gives "eis" 54 column-inches of very fine print. That ought to give one at least a brief pause, before accepting an interpretation of Acts 2:38. It has for me.
Wittman's "The New Testament -- A Precise Translation," soon to be published, gives the verse as follows:
Then Peter expressed to them, "Repent at once! and be baptized each one of you by using the name of Jesus Christ on the basis of forgiveness of sins! And you shall receive the gratuitous gift of the Holy Spirit. ..."
I would ask you to consider this.