Comradeship // Freechat
Talk about whatever, respecting the rules established by Lemmygrad. Failing to comply with the rules will grant you a few warnings, insisting on breaking them will grant you a beautiful shiny banwall.
A community for comrades to chat and talk about whatever doesn't fit other communities
I think there's a good argument to use ghenzou.
There's also https://lemmygrad.ml/c/educationhub
It seems like your purpose is a little different than the sidebar in that community, but I think you could request it. The only mod hasn't been active in a couple years.
I think it'd be fine if you wanted to make your own community for the purpose too!
Thanks for your input. Maybe Genzhou is the one, then. I don't know if I could handle responsibly the power of running my own community.