[Experimentation] I ( 19f ) want to have sex with women, but I'm not looking for emotional attachment. Is this going to be hard to find?

This is my first post, so I'm sorry if I have any errors. I'm also on mobile.

I've been sexually active for a few years now, and I've had two partners - - both male. However, I've always been sort of curious about women. I have a tendency towards lesbian porn ( which I know doesn't necessarily mean anything) and lately I've had an overwhelming desire to not just sit there and masturbate to it, but to actually do what these women are doing. A few years ago, my best female friend offered to be like a fuck buddy for me, and I'm kicking myself for not taking her up on it then as I'm sure she won't now. My current boyfriend knows all of this, and he has been so amazing! He even told me that if I ever found myself in a situation where I could possibly have sex with a woman, that I should go for it. He has no qualms with it whatsoever, which is perfect. So I guess my question is: how hard is this going to be to find? Where do I look? I'm not interested in a relationship at all, but something more casual. I sit next to this girl in one of my classes and we click really well, plus she's really beautiful. Is it weird to ask her if she has a boyfriend and go from there? I've just never been in this situation as a woman. I've never had to guess someone's sexual preference or guess if they're into me. Help me out?