every girl has there own, you know, and i'm sure we all feel a little different and we are all different. different girls like different things and ect. i've heard that guys like "tight" v-ginas. but no matter what make sure it is wet before you put anything in, or it'll just hurt the girl.
try going to youtube and searching "sex ed 102", there is a girl with a lot of videos, like a sex ed class, (there is no sex on any of the videos), she should be able to answer a lot of your questions