Are either or both of you virgins? If you both are then you really shouldn't worry about it, you're both going to be as nervous as each other, and its not like the first time needs to 'rock the cazbaa'
Otherwise, of course girls can be 'bad' at sex :roll:
Just be enthusiastic, its the biggest turn on by far! Relax, enjoy yourself (and show it) and ask him what he likes/dislikes! You'll have him wrapped around you're little finger in no time
