Hey!
Bio was my favourite subject last year, but it's certainly a subject that requires a lot of memorisation and effort.
For me, I found making flashcards really useful (I recommend making your own)! But make sure that you review them regularly (eg every 2 days) -- this helps in active recall and easier retrieval of info during SACs. And it's great to have them ready to go for the end of year exam
In bio, understanding the concepts are key -- this will help in remembering the content too. And don't get too bogged down in the specific details, e.g. knowing the location, inputs and outputs of cellular respiration is sufficient for VCAA, there's no need to know the specific molecules like Acetyl CoA and fumarate etc.
Another really useful thing to do is review each AOS
throughout the year. E.g. in term 2 hols, I not only started revising for U4 AOS 1, but made sure to review U3 AOS 1 and U3 AOS 2 content (because I guarantee you won't remember U3 stuff by the end of the year, and re-learning it takes so much time).
Good luck! Don't stress too much for bio - it's such a fascinating subject!