unity3d – Creating a server in Unity without anyone being a host

I want to create a multiplayer game in Unity, but I want it that everytime someone clicks the join button, it creates a new server, and lets other people join. But I don’t want any player to be the host, because if the host disconnects, then everyone does.
I searched for tutorials but all of them were always with a host, and then everyone needed to type in their IP, but I want it without the IP, just join any free server.
How would I go about creating this server?
Sorry if this is the wrong site, I’m new here.