A different slant.... Don't become really nervous over being a little nervous (huh?). Sometimes we'll approach a sarge, say something "wrong", get too nervous and eject. I've noticed that when I say the wrong thing, and experience the associated nervousness.. but then just let it pass like a normal occurance, I can regain my frame quite well, and continue the sarge.
If you're just "slightly" nervous, it's no big deal. She may not even notice it. Being around her a little will help that nervousness to pass. We've all seen this, it's the initial approach anxiety. We have that little bit of nervousness, and it passes, and the conversation, etc go FINE.
However, extreme nervousness can queer the deal. Would depend on the individual.. That's one of the problems with these DJ rules, there's no rules, only guidelines. If you keep your voice steady, keep good posture, don't sweat or be fidgity, I'd say YOUR FINE.
In any event, what you need to do here is the same. If you're not that nervous, approach, continue it. If you are nervous.. approach, continue it, that will help you get comfortable around women. So.. either way.. approach.