You have learned to use the Video Sequence Editor to edit rendered scenes. You have used the Node Editor to create stereographic views and composite images. You have learned to use the rendering controls to create a more finished animation and explored the Cycles renderer.
I tip my hat to you. You have done very well. You got through this book and made some awesome stuff.
You are ready to go out into the wider world of Blending. While there is much to learn yet, you've reached the point where you will be comfortable modeling, animating, and creating images and you have a solid base to understand the rest of Blender. You will be comfortable on Blender websites, able to understand what people are talking about, and ready to help others. You're going to do some great work. I can't wait to see it!
Happy Blending! Let's go!