In Acts 2|41 we read: “Those who accepted (believed) his message were baptized …”
Baptism is a choice a believer makes. It’s a personal step of faith. An infant can’t make that decision. We believe Scripture teaches that the commitment to be baptized should take place when someone is old enough to understand the decision they are making. If you were baptized as a baby, and you are ready to make that decision for yourself, baptism is your next step. It’s a way to fulfill the commitment your parents made.