Is anybody up for answering a generic question about a high schooler with a bad social situation?

Yeah, im sure you'r not. But if you do then that would be awesome because i need advise from people who dont know who im talking about so they won't be offended.

Basically, im bored with my friends. My friends bore the living hell out of me, i actually try to get out of lunch because i hate sitting with them. I have a few good friends, but they dont have the same lunch period as me or they are never at lunch or they are pretty quite at lunch. My best friend hardly has been in school at all this year. All my friends talk about is school, but they talk about things like how many AP classes they are taking next year (most of them are taking like 3-4), im not taking ANY because i have anxiety issues with school work. They have nothing in common with me, im interested in art, rock music, tv, satire, society, different subcultures, etc. They just talk about academics, and they are pretty intimidating because i am an average student and they are all really good students. They also talk about classes im not in. They tend to not be very inclusive in their conversations. I go to a really big school, so you'd assume i'd find a group of kids that have similar interests to me. I think there is a group but the problem is i dont know how to approach them, i feel like it would be weird to just walk up and start talking. Most of them are juniors/seniors so im not in classes with many of them but some of them are also sophomores. The group of people are kind of like the "alternative/punk/metalhead/ hippie" kind of people and i am interested in that kind of music and stuff. The ones i do know also seem to have similar thoughts on things that i do. The other issue is that they pretty much know each other because they all smoke in the same place after school, i dont smoke and i dont plan on starting and i know people who hang out there and dont smoke and they dont get pressured to or anything, but i just dont know how to approach them otherwise. And i'm getting depressed by hanging out with my current friends because honestly they make me feel stupid because im not in 4 ap classes or whatever. So i'm just really stuck in this situation, i feel really out of place in my group of friends and i dont really have much in common with them. How do i approach a different group of people without being weird?