Thanks!Well, I completed the 100 questions on the official NPPE website (https://nppepractice.ysasecure.com/) and read the suggested book that I checked out from the library.
I saw that several members purchased 500 questions from https://practiceppeexams.ca.
I don't think it's too hard. I would say that just carefully read the questions and answers (two of them are really similar).
I passed it the first time.