The water doesn't just symbolize change. It declares it β publicly, permanently, and with your whole body.
Romans 6:4
"We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his."
Which part of this passage speaks most directly to where you are right now?