You still have a lot of potential brother
Have you tried applying abroad? I'm pretty sure there are many airlines looking for apprentices outside of your country, Do not restrict yourself to aurstralia this industry is about moving and you must prioritize your job over your life atleast in the outset untill you become more employable and have the required amount of exp then only you can be picky at working locations.
Thats just my persepctive but do as you see fit.