Xeberus, how did it go?
I have to reiterate what one of the other posters said about not approaching girls to roll right off the bat. Most women that I know tend to avoid the newer guys until they settle in to the environment a little. I've been training about 3.5 years now, and I'm finally to the point where I feel like I can keep a brand new guy from inadvertently hurting me. It usually happens when new guy is frustrated or embarrassed because a girl is 'winning', so new guy does something drastic, like slamming girl onto the mats, or grabbing a random limb and twisting it around.
When you do start to roll with women, just think of them as a smaller, more bendy dude. There's no shame in losing to someone smaller than you, male or female.
(Okay, off of the soapbox now.)