What is an easy higher to crash? Watch
For physics it's just learning formulas and definitions. Some Nat 5 maths too.
It depends how motivated you are and what you enjoy. If you don't enjoy something you might find it hard to study for it, even if in theory it should be "easy".
I had to drop my advanced highers for personal reasons (not because they were hard) but I managed to get into biochem with AABBCC at highers. BB at higher chem and bio.
For biochemistry, AH's are gonna make your life 1000x easier as you gonna cover roughly the same material in your first year at uni. Even if you don't manage to get A's or a B's, you are still gonna be familiar with the material which will make uni less stressful
Ah, that's such a shame. Honestly, I self-learned it and it was incredibly simple to do so. I know I keep going on and on about it but I just can't get over how easy and interesting it was.
If your school has any of the Higher textbooks lying around, ask if you could have one! Great reading material in your spare time.