Let me give you some more info. I started first with a forum on my own website (bbpress). I also had a twitter and facebook account where I posted updates. Still have YouTube.

I'm 44, so for me a forum is ideal, Discord is way too intensive.

Then one of my members started a discord years ago and a lot of members went there. I switched everyone to an official one, and one member volunteered to moderate.

I would say most questions come from Discord, then YouTube comments, then email. My own forum wasn't as popular so I closed it due to lots of spam that I had to manage.

I also pushed hard for Reddit but never took off (I liked reddit more)

One thing to mention that is probably important: this is in gaming sphere with lots of kids, teenagers and young adults. Also used in schools by teachers.