how do I physically escalate after kissing the girl? kissed a girl for the first time the other day; it was good. but didn't know how to go on from there.

to clarify: I'm not trying to set up a situation in which sex can occur...assume the situation is already set up, and I'm wondering literally right after I've kissed her how to proceed.

EDIT: thanks for the advice, everybody. Honestly, I think I was just concerned/insecure because of my bro friends who were telling me about how I needed to have sex by the third date or whatever. This was our second date; we french-kissed, cuddled, and it ended on a good note. I'll escalate to sex another time when I feel like it.