The push/pull tool! Pulling a 2D face into the 3rd dimension is what Sketchup was built for, at its core. As with making a shape, you click once and let go, then nudge the face in the direction you want it to go. Type the measurement on the keyboard, and the face will head in that direction for that distance when you press Enter. 

Entering shape dimensions When making a shape in Sketchup, you can enter specific measurements for it. Clicking and releasing the mouse button starts the process, then type the numbers on the keyboard without moving the mouse. Pressing Enter will then "execute" the command and the shape will be drawn to those measurements. 

The importance of keyboard shortcuts is that you might need to switch tools fast and not have them in the "recently used" tool sidebar, then with a keyboard shortcut you can switch the tool really fast.

What is Blender? Blender is a 3D animating software that you can use to animate 3D characters that you make!