The Stage is the area on the right, and is where your project comes to life. Think of it as a performance area, just like a real stage!
At the moment, the stage is white and looks pretty boring! Add a backdrop to it by clicking on Choose a backdrop.
Click on Indoors in the list at the top. Then click on a theatre backdrop.
Click and drag the drum to the bottom of the Stage.
Your stage should now look similar to this: