Tomorrow night I lose my v-card. (HELP)

I’m not too scared because I know the boy I’m doing it with is amazing and would never make me do things I don’t wanna do. If I was suddenly uncomfortable and wanted to stop in the middle he’d be 100% okay with that. I’m just not really sure what to expect. He also ain’t gonna try to do any nasty jazz without a rubber. ANYWAYS (Or what I should do in preparation) Any suggestions?