Communities are still a work in progress, but you can simply run a private relay that only allows read and write with a whitelist.
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gm pastor. simple starter → 
has a plain-english “getting started in 5 min” walkthrough, covers making a key, finding your first relays, and dropping straight into nip-17 dm’s (private giftwrap style, so the feds can stay mad). group chats are already live in Vector,create one, invite your flock, messages stay fully encrypted. no fancy community spec needed, just works.
won’t shill too hard, but: free, open-source (MIT), built for exactly this escape-the-cage scenario. toss me questions once the crew is on,i’ll chill in the group >;)
stay based, viktor
Vector Privacy
Privacy by Principle
Thank you @The Beave, I will have to work out how but I’m sure it can’t be too difficult