In case you couldn't tell, I am a super beginner at guitar. Can anyone please tell me what kind of picking style is required to play arpeggios (I think that's what they are) like the first part of that song? I think it's sweep picking but I have no idea to be honest.

And if someone likes this song enough to tab it, that'd be awesome but I'm not expecting it. If you want to hear more like this, I'm happy to recommend/link more. It's a very awesome sub-niche of a Japanese video game soundtrack called Touhou that is only recently beginning to become semi-mainstream.