what do you do after sex?

i’ve never had sex until a few nights ago and i wasn’t sure what to do but i need advice on how to suck his dick? he seems to like it but i feel like i’m not doing it right🤷🏻‍♀️ also when we have sex he’s always pulling out and cums on his hand should i be okay with that? also what are you supposed to do after you had sex? any advice can be very helpful thanks in advance