Help!

So my partner and I have been together for a while now and we are both ready for sex.

We have done other stuff but not sex and I’m finally ready. But I wanna make sure it doesn’t hurt or anything. Do I have to be really wet or can him eating me out for a bit help so it doesn’t hurt? I need all the advice I can get cause we are finally gonna do it tomorrow night and I’m really excited but nervous☺️

Oh and I’m 18 and he’s 19