I want her but don’t know how to go about it

I’m a senior in highschool and I sit next to this girl who I find pretty in two classes , and yeah we talk nd text but it’s rlly only about school, on the occasion we might switch the subject up. I’d want to hang out w her but I don’t know how to really ask with out it being awkward since we rlly aren’t close like that or am I just overthinking it?