As others have said, if you want to write a review, just analyze the level and determine what parts you love, what parts you don't really like, and what parts don't really interest you all that much. If you can figure out why you feel a certain way about something, even better. Don't worry too much about it, though; as long as your reviews are in good faith, you'll probably be fine.

And welcome to the site! I hope you enjoy your stay here.