Hubzilla is really weird when you don't have a channel.
The top left just says "Logout", and if you go to someone else's channel, there is no way to get back to the "make a channel" screen.
https://start.hubzilla.org/
It's strange that the Hubzilla >> Start text on the header is not a link though. That leaves no visible links back, since the far right menu becomes specific to the the current chanel.