How can I make a button for multiplayer game

Hay there I am working on a battle royale game and I got stuck on a point that I want that in the main menu there should be a button colled play that can create multiplayer seasons and if it is already there it will join that
And i had already seen the epicgames tutorial on multiplayer game but I don’t want that way I want is that there should be only one button for creating and joining seasons