DMing a girl I don't know

[baseball211]

So a few days ago I followed this girl on Insta and she immediately followed back. My plan is to DM her over spring break (in three weeks) just to avoid awkwardness at school in case something goes wrong or whatever. She's beyond cute and she is definitely single. Honestly I wouldn't be here asking your guys' opinion on this but I am because I'm a junior and she's a freshman. And also we do not talk to each other at all, though I have seen her at lunch before but again we've never spoken. I don't want to come across as creepy or anything due to these factors. (Not to be cocky here or anything) I do think I'm a really attractive guy so I'm thinking that she'll be fine with me DMing her. So I just want to be cautious, should I DM her or is that out of the realm of "social acceptability"? Any tips or things I should say in order to make it less creepy and more friendly?

[Croconaw]

First of all, attraction isn't everything. Nobody cares if you are attractive. Personality matters more here, so do not comment on your appearance to the girl. I would rather date an average looking sweetheart than an attractive bitch. Try to come off as casual, but friendly. You won't come off as creepy if you don't sound creepy. I recommend just being really friendly to her. You can start with a simple, "Hey. I've seen you around school. Do you want to be friends?" You can develop a friendship from there.