We are instructed to be Water Baptized (immersion) if:
1) We are physically capable,
2) With our new life, in Christ, ahead of us.
Is there any example contrary
(to those 2 points),
in the Bible?
Go ye therefore,
and teach all nations,
baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:
Teaching them to observe all things
whatsoever I have commanded you:
and, lo, I am with you alway,
even unto the end of the world.
Matthew 28:19-20 KJV
Please see this Bible Study Link of what God says about Baptism.