How can I make my character rotate in Paper2d?

I am brand new to UE4 and I have only watched Epic Game’s Paper2d tutorial series. In my game the player character will be a cube (or square since it is Paper 2D). I want the player to be able to press (right or D) to rotate the cube 90 degrees clockwise and the cube will land on one of its faces, and (A or left ) to rotate -90 degrees counter-clockwise. I know how to set up the inputs, but I could not find out how to rotate my character 90 degrees. Any help would be amazing, and screenshots will be helpful.
Thank You,
-Ravio