Hi
21 is a young age after
ORD, you can always try out SIT, SUTD, SUSS or even SIM studying UOW, i heard there's a choice to study your final year in Australia and this will lower your expenses too.
TBH, tech company don care about your degree from where as long as you have the passion and passes the tech interview
Lastly if you die die have to go to Australia, did u consider applying other Aus uni?
The tech uni in Aus are quite good and a little lower cost too. To name a few, QUT, UTS, RMIT..
UNSW is not known for it's IT degree... if ranking does play a part, you might just wanna consider the GO8 unis.....
My 2cts as I spent 10 years in Australia after
ORD. Studied engineering in TP got 1.5 years advance standing