My opinion on your water baptism:
First, our faith in Christ comes first. Then we are obedient to be water baptized. It is our faith that secures our eternal life, not water baptism.
Second, but water baptism is important in a Christians life. It is commanded by Christ. (Matt. 28:19) And it plays a role in our walk of salvation, our sanctification, in this life. (1 Peter 3:20-21) It is an outward demonstration of what has occurred in our lives. Death, burial, and resurrection with Christ. Gives us a good conscience towards God.
Third, If the baptism you don't remember was infant baptism, then all you did was get wet. Faith comes first. So you would not be getting 're-baptized'. You would be getting now, baptized.
Fourth, the method of water baptism doesn't matter, in my opinion. Whether water has been sprinkled or poured, or you are immersed, is no matter. The matter is your decision to follow Christ's example and command to be baptized.
Fifth, it doesn't have to be done by a church, or even a pastor. Any believer can water baptize. If you know other believers, and can meet at someones house who have a pool or a creek, one can baptize you there.
My opinion.
Lees