Full immersion water baptism- after someone has received eternal life, they can be immersed as a picture of Jesus' death, burial and resurrection. Babies getting christened doesnt' count... people getting 'sprinkled' doesn't count. Full immersion of saved believers.
Now.. in Acts you see the church at Jerusalem being empowered. This is the Holy Spirit coming as the Administrator of His churches.
Before this.. Jesus and His disciples were the first church. Jesus ascended later.. then sent His Holy Spirit to administer to His churches, starting with Jerusalem.
One form of baptism.. is for the individual. This is the full immersion in water baptism of saved believers.
The other happened to groups.. who became churches. Groups. Nothing to do with receiving eternal life.. nothing to do with immersion in water.
(Act 18:24) And a certain Jew named Apollos, born at Alexandria, an eloquent man, and mighty in the scriptures, came to Ephesus.
(Act 18:25) This man was instructed in the way of the Lord; and being fervent in the spirit, he spake and taught diligently the things of the Lord, knowing only the baptism of John.
(Act 18:26) And he began to speak boldly in the synagogue: whom when Aquila and Priscilla had heard, they took him unto them, and expounded unto him the way of God more perfectly.
(Act 18:27) And when he was disposed to pass into Achaia, the brethren wrote, exhorting the disciples to receive him: who, when he was come, helped them much which had believed through grace:
(Act 18:28) For he mightily convinced the Jews, and that publickly, shewing by the scriptures that Jesus was Christ.
Act 19:1 And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
Act 19:2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
Here is already saved people.. who hadn't received the Holy Spirit.. how can that be?
That can only be if they were already indwelled by the Holy Spirit individually.. and hadn't received the Holy Spirit to be with them 'in the midst' as a church. --- Holy Spirit empowering a church 'Holy Spirit baptism'
Are you going to call believers called 'disciples' people who hadn't received Christ individually? Surely not!
Act 19:3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
These people had been baptised by Apollos.. who didn't have the authority. It was as if Apollos was baptising in the name of John and not Jesus.
Act 19:4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
Act 19:5 When they heard this, they were baptized in the name of the Lord Jesus. - full immersion water baptism