John baptism will be recommended by your church. There are seven things (distinctives) that make us Baptists..
B - Bible is the sole authority for the church
A- Autonomy of the local church - no hierarchy from outside to tell churches what to do and how to conduct services etc.
P- Priesthood of the believer - any believer can approach God without a priest
T- Two church ordinances - believers baptism and the Lord's Supper
I- Immersion baptisim for believers only
S- Saved church membership - you can't be a member of the church unless you have been saved - unlike Protestant churches
T- Total separation of church and state - no government money accepted, no control
These are the things that we believe, which make us distinctly Baptist. Immersion baptism is practiced as requested by new believers. It has no supernatural power it is only a public act of obedience to Christ. The point being... anyone can be baptized who confesses belief in Christ, and it doesn't matter what you've done before. Heh, I was baptized 4 times in the Catholic church and I was still baptized by immersion after I was saved.