How do you finger a girl?

my girlfriend wants me to finger her, i want to , but i dont know how to. how do u do it?

Hello my name is Richard and im here to give you sex advice. here is a short brief sex story about me. well I been with a lot of girls and more then half of them said I gave them the best finger ever. they called up my friend and said it was the best sex experience's she has ever had. my friend then called me and ask how do I do it that good? I told him because you are my best friend im going to tell him how. now I have never said this to any one but my best friend. my methods of giving your girlfriend the best finger is by following these step.
step 1:start off by licking her vagina.

There's no right or wrong way to do it. Girls like different things. So you'll just have to experiment or ask her what she likes.