Guys, seriously.
Going to shamelessly boast.
I'm independent and have been since finishing school. I receive no centrelink payments. I pay $200 rent per week for my room in my Carlton sharehouse.
Last year I worked a minimum of 30 hours per week with my Science Degree, which ended up being 24 contact hours. That realistically ended up being 30 hours at uni per week due to breaks which I couldn't do anything else in. 20 hours of work were at my internet cafe, and a further 10 or so (varied, but I would average it to 10 hours per week) was due to tutoring.
I still managed to save up enough money to buy myself a PC, pay for all my own clothes, fines, bills, alcohol and going out just as a normal person does, and the only time I got help was when I needed to pay to go to hospital because of a bike accident.
Admittedly, I didn't do very much study - just enough to do moderately well on exams as I was working + studying 7 days per week.
And I don't regret a second of it. Becoming independent is one of the best decisions you can make. Sure, rent is a thorn in my fucking arse, but I've fully embraced the broke uni-student life and I'm loving every minute of it. There's not really all that much organisation involved, and honestly you become a much more independent and outgoing person as a result.
Get around it.
tl;dr fully independent at 19, ask me anything