I need to be prepared

I just want to know the things I should do before and after having sex. I’m still a Virgin but in serious relationship and truly love with the person I’m with. We’re ready to take the next step. He’s not a Virgin and I just feel a little intimidated because I have no idea how it all works. I just need advice if I need to shave before ? Do I still need to buy plan b even if we use a condom? Do I suck his dick? How often should we have sex after? What will my period be like after?