DONT USE FINGERS!!!!
If you are lickin properly - you won't need 'em! I don't even remember if any man who has licked 'm kitty properly even HAD fingers! (Get what I am saying?)
It is all about using juuuuuuuust the right tongue pressure on her clit, gentle sucking on the little man in the boat...
DO NOT NEGATE THE LITTLE MAN IN THE BOAT!!!
17 huh? You are waaaaaaaaaaaay ahead of your silly little colleagues. A lot of men haven't clue one about cunnilingus, they are all about their Johnsons. She should be BEGGING for your cock by the time your mouth is even warmed up!
And I DO HOPE that there is a bit of reciprocity goin' on eventually. I seriously doubt that if she is gettin' her kitty properly licked it won't be long before she will practically be your slave. Whenever a man is that unselfish with a woman, unless she truly has ice-water running through her veins there is almost NOTHING she won't do in return.