New version of the guide for change (I'm not the author)
https://feddit.org/post/9337207
Is it possible to set up a signal server, or is it not completely FOSS?
@Valmond @SrMono
If you want to selfhost your own messenger, you can with Matrix or XMPP. XMPP, for ex, is the protocol used by WhatsApp and Signal.
Mastodon is the best way to keep up with what's happening.
Follow anyone across the fediverse and see it all in chronological order. No algorithms, ads, or clickbait in sight.