crashing higher chemistry?

Hi i’m in s5 and i was planning on crashing higher chemistry, i’ve been doing nat5 since our new timetables in june however i would prefer to work hard and get my higher this year rather than doing nat5 first as the teacher is a massive let down and isn’t a good teacher. I have a nat5 textbook i could work through if that would help me and i am prepared to work very hard. Just wondering if anyone really thinks i can’t do it.

I am currently doing H Human Biology, H English, H Maths and H Geography.

I’ve missed maybe a month of work but i am prepared to catch up and work hard, i do struggle to get the courage to ask the teacher for help however i think i can do that 🤣

Any opinions/help would be much appreciated!