You understand not the truth. For when we become born again. Our spirit is born of God. Then our body becomes the temple of God. Our body is dead to the world but the Spirit of Jesus that dwells in us quickens our mortal bodies. This is what Paul speaks of.
Romans 8:11
“But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.”
King James Version (KJV)
So you are saying that being born again is the 'baptism for the dead' and is the resurrection?! Because Paul is talking about the fact of resurrection in 1 Cor 15:29 and he uses the practice of baptism for the dead to demonstrate that belief.