Not too easy. Not too difficult.
I would highly reccomend taking Chemistry sometime in your high school life as most colleges require you to have taken it. Most high schools require you to take chemistry too, but not all do. So if I were you your safe bet is to take it so if you end up having to take it again in college you'll be familiar with most of the information.
Honestly I don't really know what to say for highlights. I guess if I have to pick a highlight I'd say most of the labs we did were really fun and cool to learn and watch. I learned probably everything you could know about the periodic table of elements and combining formulas. There was a lot of vocab in this course that you will learn.
Hours per week:
Advice for students:
Ask questions whenever you don't understand something. It'll pay off in the long run cause it'll suck the night before a test when you don't know anything and you wish you would've just asked those questions you were thinking. If you need a tutor, get one. There's no point of not getting an A in a class if there is a legit way to get one so my biggest advice; use all your resources very wisely.