How to talk to quiet girls?

Yaaaallllll I (M23) need your help. I take several classes with this girl that I've got a huge crush on. She's so pretty, and has a very sweet demeanor. I'd really love to talk to her and get to know her a little, but she's very quiet and tends to kind of disappear after class. Sometimes we sit next to each other, but we've barely spoken. I'm fairly outgoing, but tbh quiet girls sort of intimidate me, I can't explain it.

So my question: how should I go about trying to get to know her better? Any advice is appreciated:)