my girlfriend has never been fingered before, and i have done it once to someone before, when i do it to her, should i go for clitoral stimulation or g-spot?
Exaclty. go for what she seems to like... maybe talk to her about it before so she's comfortable with it.
Oh and a tip. Don't just go for the gold. Girls like to be cuddled and caressed and kissed. It makes us more comfortable. Make sure you take your time.