I think that would be enough. Imagine how people joined whatsapp. They heard about it and then read maybe 5 sentences on the website/ app store before installing it.

A landing page for my server, that by default says: “fidibus would like you to join their xmpp server, here is the app, please choose a name” is perfect. Of course there should be a link to a more thorough explanation of what snikket is and xmpp, but let’s be real it’s going to be 1 in a hundred people that is interested in that. Most people know me, know that I use this selfhosted chat and that’s enough for them to try it, or not.