Main Menu won't disappear

Awesome, I’ll definitely try this. However, what kind of blueprints do these belong to? Which one is the level and which one is the widget.

Also the way I want my game to work is that it starts off with a main menu with “Start” and “Quit” After you press start, it shows a cutscene so that I can do a narrative voiceover. Finally after the cutscene, the player can start playing. How can I achieve this?