<human>: Can you succinctly summarize the text in 1-3 sentences?

Hey Reddit, got a situation here I could use some help with.

I'm 24 and I've been single for nearly 2 months now. Previously, I was in solid LTRs (explanation below) for roughly 6-7 years and I'm completely out of practice as far as the dating scene goes. My recent experiences show that I have a tendency to get friendzoned before anything happens.

Well, my sister had the idea to set me up with a girl my age that is in her performance group. I agree and get a name, do some facebook stalking so I know who to look out for, and a few days later I go to a performance. Then after the performance I go to where they're cleaning up and my sister introduces her to our mom and myself. I couldn't think of anything I could do or say in the situation with the overbearing-ness that was my sister and mom standing right there. So I introduced myself and that's about it. I am sure I came across as shy. We made eye contact for only a couple seconds.

I'm definitely interested and don't want to mess it up.

So basically at this point I don't know any of her contact info and we're not friends on facebook. I'm looking for tips on how to proceed. I found the [how to flirt guide] this morning, is there anything similar I could reference? Should I let my sister continue to set us up or should I step in? When should I take the reins?

LTR Explanation: For the last 6-7 years I suppose you could say I took the "easy way out" and simply started a relationship with an old girlfriend from high school or something. From what I remember, very little was needed in the way of flirting or building attraction, as I already knew them fairly well before we started dating.
<bot>: Sister is setting me up with a stranger, but she thinks we'd be good together. Briefly met her and I am interested. How to not mess it up?