Could you share what you have so far? And leasts take this a step at a time.
First, lets address adding a layout for a menu screen. I implemented a seperate layout for my menu screen in my own test game.
Remember that whatever Layout you have selected will be the one that loads in the preview, so if you have no way of getting back to the main menu on your second layout you'll be stuck in the second layout until you reload the right layout in your preview.
There is a system action that allows you to load a new layout by name.
Try working through that. And I would also recommend reading through the manual at least once through. Not a super detailed reading, just a quick read through. You'll soon realize that things will just come to mind of what you could do, and you'll have an idea of where to find it in the documentation.