I used a great online resource on yt by a gentleman who's channel is Dondroneson, to study for and pass the basic certification a few months ago. He's put a series of video's together that give you a lot of important info and guidance...and point the way to the other info that you can get from transport Canada. Having said that, you have to be prepared to sit down and review the information. It is not a cake walk. on the plus side, you can repeat the exam after waiting 24 hours and there is no limit. If you do fail, look at is as a learning experience that highlights where you have to do more study. As someone pointed out, the pass is 65% and you have 90 minutes to answer 35 questions.
Now, the advanced certification is another issue all together. You have to pass another exam with 50 questions and only given 60 minutes to do it, and the pass is 80%. Even if you do pass, you also have to find a qualified flight reviewer and pass the flight review which is more than just showing that you can fly your drone. The certification for the advanced certification requires work. Are the rewards worth it? depends on where and what you do and plan to fly your drone. If you live in a high controlled airspace it is worth the certification. For example, in the greater Toronto area, unless you're flying at a MAAC (equal to an AMA) field, you will need an advanced certification and go through the process....or drive out until you find G class airspace and fly with a basic certification.
I just completed my flight review and received my advanced certification and while I did do a lot of study on my own, in the end, I decided to take advantage of a fathers day special with a reputable aviation school with certified drone instructors and take the course. Passed the exam on the first attempt, and the flight review a few days later. Yeah, it is a more expensive route, but there is a lot of information that I got from the experience of the instructors and other peers that I would not have easily found doing this on my own. Also the contacts and classroom setting in this case was great. Just my two cents worth. Regardless, do a little work and get the basic certification and keep flying...just my friendly advice. Cheers.