summer with no friends

I am not trying to play the victim role or anything i know everything its my very own fault and no one else is responsible for me not maintaining any friendships. So im 17 and i dont have anyone to talk to or hang out with this summer. I got a job which requires to talk to people on daily basis which helps with my social skills and anxiety and my coworkers are nice and all but they are all too old to be friends with. My question is how do i put myself out there and hopefully find some people with similar interests/hobbies?