Subreddits are weird. Because of how Reddit works, it's awful easy for the place to be governed by state actors and various coordinated brigades. So you can be there, sure, but if you're in the wrong place with information someone doesn't want seen, it won't do you a lot of good as you'll get the "oh look, 25 downvotes in a matter of seconds, someone's on point today" effect. It's REAL easy to police Reddit and enforce your agenda if you're organized and have teams of bots or sockpuppets.
Can anyone recommend any good obscure subreddits? I have trouble finding new content.
It depends on what you're interested in. There's virtually one for any topic.
Discord? I've had good luck with chat rooms these days.