Actually trying to show what water Baptism is verses Spirit Baptism from Father (rebirth) and which one is actually in effect after the cross
In Heb 6: 1-2, Paul mentions six fundamental doctrines of Christ and the Christian Church,
And one of them is, "Baptisms", Plural,
That's because the Bible teaches three Christian baptisms.
[1]The rebirth, 1 Cor 12: 13 says, " By one Spirit we are baptised into the body of Christ", This is the rebirth.
[2]The baptism in the Holy Ghost. Matt 3: 11. Acts 1: 4-5.
[3]Baptism in water. Acts 8: 36--38.
One can have the rebirth without having the baptism in the Holy Ghost or baptised in water.
One can have the rebirth and the baptism in the Holy Ghost without being baptised in water.
But no one can have water baptism or the baptism in the Holy Ghost without having the rebirth.
All three baptism are in effect after the cross.