Ok there are scriptures that do say you must believe. But there are also scriptures that say you must repent. There are scriptures that also says you must be baptized. Dont take chances when eternity is at stake.
The scripture references the flood and noah and his family being saved by water wherein the likeness of Baptism now doth save us.
Jesus saying he thay believeth AND is baptized shall be saved
Peter when asked what MUST we do to be saved replied "Repent and be Baptized"
Nicodemus asked about being saved. He was told unless you are born of the spirit and WATER you cannot enter the kingdom of heaven.
Paul was not saved on the road to damascus as some believe. He was told to go to Damascus and he would be told what he MUST do. He was told when he arrived "arise and be baptized and wash away your sins" he believed in jesus when he was confronted by him on the road. So if belief was all that was necessary he would have had no sins to wash away.
Now after stating all of this
baptism is useless unless you believe. It is useless if you dont repent. But Baptism after belief and repentance completes the process of being saved that Gods word (not mans word)plainly states.
So back to the original question Geezer asked,if you are truely saved( the way the Bible teaches) you are automatically added to Christs church. The church is not a building it is the body of Christ composed of those that have been saved .