How do i make more friends in high school?

I'm known to be quiet and not very social. Sure i go out and stuff but just with a couple friends, but it's not satisfying enough like yeah they're great friends but i just want to have more fun. I want to be more social going into sophomore year but i find it hard to open up to others who are a lot more different than me. I easily talk to my close friends like anything will spark a conversation but with new people i find it hard to even make one small comment, i also feel like they won't like who i really am. Any help would be appreciated.!