Women have something like 5 times the nerve endings as men do "down there." So more pressure, more motion, etc., really isn't more. It's just distracting and/or painful.
As a woman, an almost woman, the best thing I can say is, don't just start going at it! It is uncomfortable and it helps if you set the mood first.
Teasing and blowing really feels good. Let your mouth do the work, not your hands!
There is nothing I love more than his mouth on my clitty and two fingers inside me my ass. It doesn't really matter if his tongue moves back and forth, side to side, or in circles. All that matters is that once he chooses a method he sticks to it and DOESN'T CHANGE OR STOP.
After a little of this I'm begging and pleading for his fingers inside me at the same time. They don't need to thrust because everything is already so sensitive.
He just slides his fingers in and does a slight "come here" type motion while continuing to use his mouth on my clit and I usually respond by coming quickly indeed!