Not too easy. Not too difficult.
The course itself is pretty easy since a lot of assistance can be found online because it's such a popular class. But even if you don't search and get advice from people who've already taken the course, it's still perfectly achievable to get an A as long as you just do your work and turn in everything (even if it's not completed, turn it in because this is an AP course and late work isn't taken!).
I learned to see patterns in history that in hindsight seemed pretty obvious but had just never clicked for me until my WHAP teacher pointed them out. Seriously, the things I learned are things I never would have taken the time to just think about on my own.
Hours per week:
Advice for students:
Get a review book for the AP test - and then use it! I promise you it will help. Just going through the class may be enough for some people but review books like, my personal favorite, the world history Princeton review book, will help immensely to prepare you for the AP test. And don't be intimidated by its size because the WHAP review books are made up of half-actual review, with the other half as two free WHAP tests, so it's actually a much shorter read than the impression of its overall size would give you.