Most of the Linux support community is all handled in forums, though there are some development oriented chat spaces. If you’re looking for a place to just hang out and get live help, youre probably not going to find that.

That being said, the documentation for all distros is massive, and about as complete as you can get. That should be enough for most people, but I understand that not everyone is so technically inclined. I’ll hit some key points:

Most active: Probably Fedora or Arch Best Wiki: Arch first, Fedora second, Debian third, with others usually referring to the above Most active: Arch first, Debian second, Fedora third, with most Fedora comms happening in dev channels and issue tickets

In order to get help though, you need to get familiar with figuring out if your issue is with the actual distribution (it almost never is), the specific software you’re having an issue with, or a combo of both where the software has a configuration issue with the specific distro you’re running.

If you’re having a problem with Audacity on Fedora for instance, don’t go looking to the Fedora community for help, because it likely has nothing to do with Fedora. Go to the Audacity GitHub and search issues first, then start looking for specific information to your issue (error messages, logs…etc) next.