Best advice for a sex newbie ever:
Put her on top. ((that way if she doesn't have an orgasm.. it's her fault. LoL))
Eat lots of pussy so she does have an orgasm.. thereby increasing your chance to get laid again.

Don't do anything stupid like play Marvin Gaye.. that's what 'setting the mood' made me think of. Candles, dinner, smelling nice, bathing, a couple glasses of bubbly, turning off shrek2 playing in the background.. all good ideas.