Launch game with certain map/settings

Hello, I am working on building a game launcher for my project.

I want to be able to use the launcher to the select level, select settings and select character. So in essence the launcher will serve as the main menu.

Does anyone know the best way to do this? Can I use Command-Line Arguments to execute console commands? Or will I need to create game saves from outside of the game? Or is there another way of doing this?

Any form of help would be greatly appreciated.

I’m in pretty desperate need of this. If anyone could help, I’d greatly appreciate it!