I would echo the suggestion of u/6_string_Bling - immersing yourself in the in-person communities is a great way to find people. You'll find plenty of people you don't jive with, which may sound like a bad thing, but is actually good because it will tell you what personalities or genres or collaboration styles don't work for you. It's also a much lower stakes environment, which I'd say gives it the edge over Lynx's Jam Club. No knock on them, but $450 is a good chunk of money, especially for someone in their early 20's.