Best way to determine game mode (and consider respawn) /player controller etc

Ok so you probably have no idea who I am because I’m not famous…But! I was wondering if there are any professioanls who know the answer to this and could give a suggestion.

Respawning in first person shooters involves reassigning an actor to a local controller or something like that.

But what I’m really interested in is what you do from the main menu.

My questions are:

I start the game, it goes through the game previews/cutscenes and then gets to the main screen.
What is your generic path if you would be able to share when I click on “explore” vs “fps mode.”

When you click “join beach mode” instead of “join office mode” do you typically put in “is locally controlled” boolean? or what.
I am trying to make a game similar to garys mod. And possibly if it becomes successful I might even hire anyone who answers questions here.

If you would like to share I would appreciate it. I dont have time to keep looking at old posts and I need some direct answers and would appreciate it if you didn’t say “search the forums.”