I'm not straight or curious (any more), I'm a bi guy. I lived much of my life as a gay guy, though. I've fucked more than a few guys. What are you curious about, in particular? I think that your best bet for being with your first man for anal is to find someone with some experience. I know, it seems more romantic to get it on the first time with another "untouched youth," but two levels of inexperience building on each other can be a little problematic. Someone who can take you without a lot of struggle is going to be better, and someone with some sinuous hips who knows how to grind 'em is going to be even better.
In general:
Use a lot of lube. Get the water or silicone based kind, and use a lot.
Go slow and easy. I know, it feels like you should hurry and experience it, but the whole deal is about x5 better if you slow down.
I know it's a bit of an advanced technique to rim, but at least finger his ass some before you move in.