Is there an appropriate way to flirt with a coworker?

So there's this new girl that started working here a week or so ago. She's Asian and super cute, and sometimes I'm the one training her and showing her how to work the cash register and stuff. Today she was following me around while I worked, trying to observe how I do things so she can learn from watching me, and I couldn't help but think if she might be interested in me. But since she's a coworker, showing interest in her is tough. I mean, I don't know how to flirt anyway, but the fact that she's a coworker makes it even more difficult, because I *could* get in trouble if it goes badly. Should I try it or should I just not even step into that minefield?
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