I am wondering how much liquid is normal when a female cum?

Sweetie its perfectly fine :) I don't even cum when finger myself.

Yeah you should be fine. We have different kinds of orgasms.. Most of the time I just a get a little more wet down there.. I've also been able to squirt out a whole bunch. I've seen porn where they got cupfuls coming out of them. You don't have anything to worry about. As long as your body feels good who cares how much you cum. Besides.. who wants to make a mess anyway?