Mark 16:15 And he said unto them, Go ye into all the world, and preach the gospel to every creature. 16 He that believeth and is baptized shall be saved; but he that believeth not shall be damned (condemned).
Baptism is total immersion in water.
It is likened to a burial.
Romans 6:4 Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
Baptism follows belief of the gospel and repentance.
Acts 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins…
Baptism is for the remission of past sins.
Acts 22:16 And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord.
By baptism into Christ we put on Christ and become Abraham’s seed and heirs of the promise of eternal inheritance on the earth.
Galatians 3:27 For as many of you as have been baptized into Christ have put on Christ. 28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. 29 And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise.
May I suggest that you read:
Why Baptism Really Matters: https://www.thisisyourbible.com/library/show/178
I hope you find this helpful.