[M] My first hookup tomorrow. I'm a virgin. Tips?

So we have agreed to meet up, watch a movie and have 'fun'. I'm going to be bottoming, cause i'm vers (i think?).Apart from 'wash yourself', what tips do you guys have. Im really nervous that im going to stuff up.So the deal is that i pretty much wank myself while it is happening right? Or later on? Idk that is what they always do in pornWhat position is good for first time?Thanks!