Never been kissed.

I have fantasies of being with a girl and girl on girl porn (not the kind with dildos) is the only porn that turns me on. I have never had a girly girl come on to me. Only one girl came on to me and she was rough around every edge and was hitting on me at a time in my life where I was all about the d. But my desires have shifted a bit. I still love the d but really would love to try out this fantasyI have. How do you figure out if a girl is into you to even approach the topic or situation? I am in Illinois. Any suggestions?