alt Hacker NewsPleroma looks to be very twitter-y. I don’t feel twitter is a great model for a small tight-knit group. For a larger less familial group, it’s probably better suited.
Like, i’m thinking photo album sharing (twitter-like makes photos ephemeral, quickly disappearing on the timeline) and conversation (twitter threading has never been strong imo).
If you were going for a social-media-y experience, I'd not recommend Pleroma (or Akkoma which is the less problematic fork) because dealing with Erlang+Elixir is a massive pain in the arse. You'd want GotoSocial[0] (single binary, reasonably straightforward), snac[1] (haven't tried it but fedimeteo runs a whole bunch of instances successfully), or one of the other small servers (Takahē, bovine, etc.)
[0] https://gotosocial.org
[1] https://codeberg.org/grunfink/snac2