Not too easy. Not too difficult.
I would recommend this course if you are willing to study. Despite the fact there is only a teacher online, you still can ask them questions via email or other ways, and you still gain a good understanding of the lessons if you put in the time to study.
This course gives you a good understanding of the timeline of America, and how the USA got to where it is today. American History A is worth half a credit, and is much faster than if you were to take a regular class (not online). This course is efficient in that you can log on at any time to complete a lesson rather than have a specific time every day.
Hours per week:
Advice for students:
If you plan on taking this course, make sure that you have a couple of hours to spend every weekday to do the lessons. As long as you do the work and don't just skim through, you will definitely succeed in this course.