jinx_58
Hey jinx_58,
That's a good question! I would say the most important thing is that you need to create a timetable with all your practise exams and schedule them in. There are hundreds of practise exams you can gather but its no point just blindly doing them when you feel like it. So, you need to create a timetable and religiously follow it until the exam date. You need to also schedule in review time but the review time should get shorter as you progress and improve. If a spontaneous dinner/lunch comes up with your family that you can't avoid, then you must reschedule it and do it at the rescheduled time. If you really can't do it, then remove it but make sure you are removing a not-so-important exam. As you will have multiple subjects, the timetable is the only way to organise yourself and check your progress.
In terms of practise exams, I completed practise exams all over Australia. Because QCE is new, its slightly easier than all the other states. So doing VCE, HSC, WACE, SACE etc. will help you a lot because its usually harder. You bend the metal further than where you want it so it lands in the right place in the end. After you download all those papers, you'll have hundreds to go through and usually prioritise the newer ones and schedule it into your timetable. There will be questions that are irrelevant, so make sure its irrelevant and cancel and account for the time difference.
Finally, specifically for physics, it's important to understand each concept. The only memorisation is needed for the Standard Model and the necessary QCAA definitions. Everything else must be based on understanding. That's the only way you'll be able to solve each question in the exam. After you understand, grind the practise questions.
Hope this helps and feel free to ask more questions!