Kiss her lower abdomen first and the insides of her thighs. Tease her a bit and act like you are going to do more before you actually do. Then gently insert a finger in and slowly draw it in and out while licking her clit. Put some pressure on it, but not too hard. Lick up and down and side to side. You will know she is liking it by her reaction. LOL Just keep focusing on the clit, up close to the top, until she reaches an orgasm.