BackStory: I'm a sophomore in high school(15m) still a virgin, and my status in school is fairly close to omega, but thanks to TRP I have at least gotten a group of friends and a couple of hobbies and interests to better myself(basketball, drawing, animation, reading, engineering)

Ok. Here we go-

Currently i'm in a situation where I don't know what to do, despite rereading the sidebar multiple times.

I'd rather not beat around the bush, so let's get to the point.

This lesbian(bi) just moved here, and automaticaly shows interest in me. Played some of my game off of her and now she's grabbing my ass, hugging me, all that other happy horseshit. Got her number, we start texting. I suggested we should chill and match(weed) and she agreed. Flirt with her aggressively, but after all of that, I have no idea how to escalate. I've never even kissed a girl before, so I have no experience in this at all. Ended up chilling at my house for a couple hours and her mom picked her up, nothing happens.

How do I cross the line between playful touching to intimate action? I don't want to dig myself a hole that I can't get out of.