Incredible ATAR miniturtle!
Congratulations!!
On that basis, how did you study for exams? How many practice exams per subject?
How many hours did you study for starting from this time of the year?
(yes quality > quantity, but just asking 
Also, what's your current project in the Global Challenges part of your degree? 
Thank you!
Thank you!

Practice exam questions were my main form of study, with teaching other people (irl and online) and using online flashcards also playing a significant role. The amount of practice exams varied per subject, for biology I did around 30(?) but for my other subjects it was less, eg. for physics I only did 3 practice exams but I did more "area of study" practice questions.
I have no idea how many hours I spent studying, as I didn't use study schedules or anything like that. I did barely any study on the weekends, but I usually stayed back at school until 4:30/5 and also woke up around 6:30/7. In the lead up to exams I basically studied all day (on weekdays) unless it was the day before an exam, in which case the focus was on my mental state, nutrition, hydration, exercise and sleep.
I also had a bad habit of pushing to hard on the holidays (5:30 wakeup, 10:00 sleep, productive the whole time) and then burning out before semester - I do not recommend this approach.
For my leadership quest (1st year project) I identified the SES gaps in STEM as a social issue I wanted to address and my intervention for this is a STEM camp targeted at students from disadvantaged backgrounds, to help engage them in STEM.
For my interview and supplementary form in my application last year, the plan was to have a device that would attach to watches/smartwatches and monitor the person's galvanic skin response to see if they were dehydrated and send them alerts to remind them to drink water. There were a wide range in the types of projects people used in the interviews and forms, so I'd encourage anyone thinking of applying not to be afraid of being creative

No problem at all!
