[jaemoe]

You need to change the homeserver url to another one. There is a list here https://www.hello-matrix.net/public_servers.php

Also what do you mean by "That are always full and require invite" ?

[ptman]

That list is unfortunately no longer maintained and quite outdated. https://publiclist.anchel.nl/ might be better.

[nelsonenzo]

Thank you both for highlighting my point.