How do I give good oral sex to my girlfriend?

So, I dont want any male answers, since I couldnt care less about your tricks etc because you can't be sure if your partner is happy with the job even if she said she did.
So female answers only, please
I know how to start and such but I need concrete info on what to do to make her feel very good.

Please help me?

The best advice a girl could give you, is to ask your girlfriend. Shes the only one that knows what feels good. We are all different, with different feelings. Something that may work for one girl, may not work for another.

hit the right spot when you find it she will surely let you know

Ok I thank you Good advice