That’s okay!
I personally did health in year 10 and found that it was definitely helpful in year 11 and 12. However, some people in my class didn’t do it in year 10 and were fine.
I would definitely make sure to go over the study design and look over the topics because it is repetitive and boring for some. However, if you enjoy subjects that require memorisation and definitions you’ll definitely like health and won’t find it difficult.
Let me know if you have any other questions 🙂