Here are 4 assignments for you

Create a rectangle with pink color and a triangle with green color. 
Keep the triangle on the top of the rectangle. 
Select both. Use Union. It should look like a home icon. 
Name the layer as home.

Draw a 2 circles.
Keep one on top of the other. 
Select both and use Difference.
It should look like a crescent.

Draw an ellipse. 
Create a star with 10 corners. 
Keep it in the centre of the ellipse. 
Select both and apply Exclusion.


Create 2 layers named crescent and star respectively. 
Cut the crescent shape and paste in crescent layer.
 In a similar way do for the star shape.