It’s a question we get a lot. Scripture teaches that Jesus’s disciples were following His example in baptism. Baptism by immersion is a part of one’s acceptance of Christ for salvation.
"WHY SHOULD I GET BAPTIZED?"
"CORRESPONDING TO THAT, BAPTISM NOW SAVES YOU—NOT THE REMOVAL OF DIRT FROM THE FLESH, BUT AN APPEAL TO GOD FOR A GOOD CONSCIENCE—THROUGH THE RESURRECTION OF JESUS CHRIST."
1 Peter 3:21
New American Standard Bible