This example from Arabella has a lot of different parts - you don't have to use everything you've drawn, but just hide layers instead of deleting them so you still have them if you want them.

If you don't have a program, you need to install it, but even if just updating, make sure you have the correct version for the class. Don't just keep getting the latest version all the time!

Of course we'll save the project before doing anything with it. Then we'll make a "Composition" and set its duration, so that when we import our Monster it will have the same duration. It is VERY hard to add more time later, but a simple matter to shorten it.

One of the most effective and simple things to animate is Rotation, which happens around the Anchor Point. Change the anchor point for all layers using the Pan Behind (Anchor Point) tool. Once you add keyframes you can't change it.

AE has a nifty tool that lets you stick pins in your artwork and animate them by changing their position over time, the very definition of Keyframing. It takes practice, and first tries are often pretty weird, but you can get amazing results from designs even when you can't animate any other way. The goal is to not break the "laws of physics", so to speak.