It's possible to self learn and still get good marks, not just chemistry but a lot of other subjects too, there's plenty of helpful online resources that you can learn from. For chemistry I looked the Chemistry in Focus textbook and some YouTube videos ahead of time, wrote some notes in my own...
Maybe instead of doing 3x10 per day, do it every other day to let muscles recover, and if you want to make your training more fun you could alternate between 3x10 and 3x4-6 rep ranges and progressively overload for each rep range, as long as you don't push yourself to failure you can avoid...
I think both rep ranges are fine for muscle growth, but be careful with upping the weight as it makes you prone to injury unless you warm up thoroughly. For example I used to do 25kg pull ups and 45kg dips for 3 sets of 5 and ended up with some shoulder impingement due to not spending enough...