I'm also a younger hacker and I have the same issue. I've found 0x00sec.org is alright, and security CTF forums can be decent, but there's an awful lot of people just looking for easy answers and aren't interested in learning or sharing knowledge.
It doesn't catch all of them, but a decent defense against the worst of that lot is a second forum that requires reading comprehension for access.
https://twitter.com/_mg_?lang=en
Guy does some insane hardware hacking. See who he follows and who's following him. Look at who he's working with. Find out where they hang out online.
Like all things these days, you really have to do some research and dig to find the good stuff. MG is a great starting point.
Hope it helps. . .