As far as the sex thing goes I can give you a few pointers so you shouldn't be a total numb nut. 1st off it is very important to take your time. Make sure to do things she likes and fully devote yourself to her pleasure. Make out for a while and keep your hands off her crotch and boobs but get them everywhere else. When you finally do pull off her clothes make sure to do it slowly and controlled unlike most of the guys that act like a dog with the little red thing hanging out.
Now from then on depending if you are comfortable with it you should probably consider going down on her if not at least use your fingers for a while. DON'T JUST PLOW IT IN!!! By "IT" I mean anything your penis, tongue, fingers, whatever. If you use your fingers make sure to get some saliva on them. If you are coming down on her make sure to give some attention to her legs and labia before attacking the ****. If you do your job right by the time you get your buddy inside her you won't need any lube...unless she doesn't naturally produce enough which is quite common so don't be freaked out if she doesn't.
Be respectful and communicate. Now asking what you like is fine but don't be asking it every minute cause then it makes it look like you don't know wtf you are doing and that you are insecure. So when you come down on her instead of being like "what do you like what do you like huh huh huh???" lightly lick and kiss her and say something like, "mmmmmm don't be afraid to use that lovely voice god gave you." Sounds kind of corny but you don't come off needy and you are letting her know she can open her mouth without upsetting you. Honestly the best and probably only way she is really going to communicate with you is with her body and not her voice. If she is moaning, moving her pelvis up to meet you, tensing up, pulling you closer or a number of other things then she is liking it. If she is just laying there then she is probably not into it.
Hope this was helpful.
