@Mike Dilger @Low Information Voter Hello, dear Mike!

The easiest to use clients are Cheogram on Android and Gajim or Dino on Linux.

Regarding the servers, you can join any one.  I like jabber.fr

If you want to run your own server, I heard the easiest is with Snikket. I know people who even set this up for their family.

The link is:
https://snikket.org/start/

You could pay for the people there to just make it work for your, or self host here:
https://snikket.org/service/quickstart/

For what I understood, Snikket is a pre-configured version of one of the famous servers (dont remember which now)

If you need the direct link to its docker file, its here:

curl -o docker-compose.yml https://snikket.org/service/resources/docker-compose.yml 

 I got prosody to work, and Gajim.  Thanks. 

 Yeeeaaahhhhh!!! Party!!!! 

 This is how you send an XMPP chatroom link (in this case the room of prosody users):

xmpp:prosody@conference.prosody.im?join