i know people here like to hate on discord servers, but this is one thing they shine at, it's easy to drop in and just ask a damn simple question to people that are online, in real time
The value of public forums is that their content appears in public searches, can be publicly linked to, and that they facilitate asynchronous, longer-form and longer-term discourse.
And yes, the usual thing: since it's not a forum it's impossible to search the history (yes they have a search button which is useless for howto type questions). It's also impossible to browse it like a forum to see what problems people have encountered before you have them and possibly avoid them, or get better insight in the stuff you're using.
Not realtime, sure, but for me most of that time that's perfectly alright.
For specific questions related to a particular technology: look for the specific Discourse (or forum equivalent) site.
Otherwise, discord as last resort.