Hi!
Person who just finished VCE here.
It's great that you want to create positive study habits before year 12! I'll just say a few points about VCE and general studying.
Quizzes and things like that are a good way of revising information, but remember that each subject will require its own unique approach, so spaced repetition will not carry you alone.
English: (I'll go with mainstream like the 50000 other students each year) you'll only improve by reading and writing practice essays/paragraphs consistently and seeking feedback. You should revise events and quotes of your text, so spaced repetition can come in handy.
Math subjects: you can (should for good measures) learn the formulas even if cheat sheets and formula sheets are available, but quizzes don't exactly work here, so just remember to revise older concept periodically by doing math problems alongside new topics. (I mean, obviously, but sometimes people forget that previously taught concepts because they neglect them and then have to go back to functions and graphs again.)
Science subjects (my area after doing 3) require both spaces revision of information and doing practice questions. So students need to learn how to structure answers based on marks, command term and key concepts. (It's very methodical but people struggle with this, so they don't get all the marks.) So spaced repetition should be complemented with questions to make it efficient and worthwhile. (Closed book to act as active recall and then correct it.)
For things like humanities and commerce, I imagine that it shouldn't be too different from science (based on my memory of legal studies 1&2). Learn concepts and finer details, and do practice questions, because VCE is all about analysis of what you already know and the information provided.
I have zero information about more practical VCE subjects unfortunately, but I imagine other than some basic theories, it's mostly analysis and actual work/practice. (Vaguely based on my friend who does art)
As for study techniques:
Keep spaced repetition because it will be very useful in year 12, but couple it with practice questions. (Not to mention end of semester exams, but year 12 is when it'll shine the brightest when you won't have to cram two semesters of knowledge in a few weeks.)
Build a routine of sorts around studying and keep stuff tidy and organised (I'm not saying that you need to set an exact period of time like 5pm to 9pm, just something like sitting down at 5pm to study and do homework. The routine is to help prevent slacking off, not restrict your time completely or make you obsessed with the hours spent studying.)
Do some research around study techniques and note taking methods. You have a lot of time to experiment and find out what suits you the best, because your brain is different from everybody else's. There are techniques like the pomodoro which people either love or hate, the feynman technique which is the fancy name of teaching anyone or anything to learn concepts better (pets, dolls, younger siblings(I'm a victim of this technique), friends), active recall, using mnemonics and etc... All available on social media and Internet.
Most importantly, build positive habits like proper nutrition, sleep and exercise, and limit distractions when you need to focus.
Don't forget to take care of yourself!
