While some of the new users from Twitter are discovering the wonders of #decentralization in the #Fediverse, I hope that perhaps they would like to try some alternatives to #proprietary messaging? Might I recommend creating an #XMPP or #Matrix account. Ask around to find a local server (there's lots).
Some clients to look at once you've created a new account:
https://xmpp.org/software/clients/
https://matrix.org/clients/
