How to make a main server lobby system? (In GUI form) [closed]

Im pretty new to scripting, and I am trying to make a mini game type game where you can play with friends or random players. My main issue is making a script that lets you create a public, or private lobby. Here is what I want the function to be, so you can get an idea of the help I am needing. (Keep in mind that the main game is just gui's. Its like the Survivor lobby except in Gui form.)

When getting to the "Create or Join Game " page, there is an option where you can create a public or private lobby.

The public lobby lets other players join your lobby, and the private one will only let people in your friends list in that lobby.

After creating the lobby, it will show up in the "Join Game" page. The lobby will be visible to everyone else inside of that page, and give them the option to join. It also would list the time remaining, and amount of players in that lobby (?/10)

After 30 seconds, the server will teleport all the players (in either lobby) into a private server.

Keep in mind, that I do not want the entire script written for me. I want to know if this is even possible, and what functions I can use in the script to make it all work.

Thanks, and have a good day.