I have been scratching my head lately because my goal is to create a game but i don’t know how to make a multiplayer mode just like Call of Duty
You should be able to find tutorials on how to create a lobby. It depends on how you’d want things to be set up and also, how you want your database to function. A bit of warning though, there is a lot more to a ‘online’ game than a single player one. Good luck
You’re looking to do at least 5 times more work to have the exact same game, but with online multiplayer. At LEAST 5 times more.