Create your own community (aka - matrix space/room), set up end-to-end encryption, start the invites. https://matrix.org/docs/chat_basics/private-group-chat/
Otherwise, to find existing rooms, I've relied on this in the past: https://matrixrooms.info/
Create your own community (aka - matrix space/room), set up end-to-end encryption, start the invites. https://matrix.org/docs/chat_basics/private-group-chat/
Otherwise, to find existing rooms, I've relied on this in the past: https://matrixrooms.info/