How old are you?
My kids were 8 when they read this book. (I guess it's the same book)
They could explain the story and wrote the opening/main idea/
story end by themselves (as kids, though). They even could described each character
shortly (who, what, when, where, how, why). The teachers just gave them step-to-step to work.
This is a kid book. I'd suggest you do homework by yourself first.
The next book your teachers/professors will assign will be more difficult
than this. If you don't start today, you won't go anywhere but be left behind.