Hi there. I have designed the course to double as a beginners guide to GB Studio itself - especially lessons 1 and 2, which take you step by step through all the basics. The scenes created in lessons 1 to 4 are all Top-down scene types as well, so you will find them most useful. Lesson 5 also covers animation states in more detail so you will find that one paritally useful at least.
Since lessons 1 to 6 are free, I'd recommend certainly working through 1 to 4 as that will give you a great foundational knowledge when starting out. Cheers and good luck!