History shows that we are not alone in this practice. For the first 320 years of Christian history, immersion was the universally accepted mode of baptism. Many of the great churches built during those years, including the leaning Tower of Pisa, have large pools in which they immersed believers. Even the Reformation heroes like Martin Luther, John Calvin, and John Wesley agreed that the accepted New Testament practice was immersion. Again, the most accurate response can only be found by looking in the Bible.
Baptism is a practice for believers.
This passage reveals that Faith precedes baptism. Throughout the New Testament repentance and baptism are linked together. Repentance means to have a change of mind. It means to make a U-turn or to do an about face with your actions and attitudes. Of course repentance will not happen without the foundational establishment of faith or belief in that person's life.