The key is to act naturally and confidently. It's easier if you have a situation already figured out, but things rarely ever work to plan, so be flexible. I went through a rather long "phase" where I was super up-front, like, I'd come out of the blue with "Hey, I like you, want to go out tomorrow night?" and that never worked, because it was so unnatural. Part of it depends on her, as well. Like, sense of humour, sense of adventure, and most of all, if she's single and unaccounted. So, knowing nothing about her, your chances of hitting it off are pretty slim, honestly. Getting to know her without being creepy is also a challenge. If you approach her with a platonic interest and a halfway decent ice-breaker, then you might be able to get to know her a little better, at least.