Hi there,
First of all a huge applause for your ambition in VCE biology that's great to see!
However I think you're preparing overly ahead it is important to enjoy the freedoms of year 9, while you can!
Also as your year 9, unfortunately, the textbook you have will not have the relevant study design (syllabus)
I have attached the 2022-2026 study design so you can see the topics that will be covered
If you're very keen I would recommend using khan academy or watch crash course videos (youtube) on the topics mentioned in the study design to expose you to the information that will be taught.
Also, I would encourage you if you can 'accelerate' and complete 1/2 biology in Year 10, to get you started with your interests, but like I said you don't really need to do much preparation but if this is for your free time this might be helpful.
Then to quiz yourself you can use free quizzes available that might be a good way to revise.
If you would like to PM me for a further discussion feel free to do, otherwise
Wishing you all the best,
-T&S