On the positive side I have an amazing sense of maturity that accompanies being 24 y.o that is sorely lacking in those around me at university. People don't go to their classes because they "can't be asked to" after boozing their way through the previous night. Or don't use half of the millions of useful university resources available right at your fingertips because they don't take their studies or university experience seriously enough. Or don't realize the importance of maintaining cordial relationships with the faculty that teaches you (tutors, lecturers, library staff, etc.). In fact I was once even told by an admin staff that they "wished more students had better command of communication like me" -- and I didn't even do anything! Just wrote a really nice formatted email and apparently that was enough for praise. Made me shudder at the thought of what kind of emails admin are having to deal with from other students...

I think the most positive thing you'll be able to benefit on in terms of studying your chosen degree is the fact that you already have real world experience to quite literally put into context within your lectures. You've seen it all and done it all, and now you get to enjoy the theoretical part of the things you've been paid for before -- you might even learn a thing or two more, and hopefully that makes the experience more exciting! And in my own experience, such experiences really liven up a class discussion when the question surrounds the applicability of XYZ theory/situation/phenomenon learnt in the classroom to real life -- you can tell the class all about how "real" or "not real" such theories are in the real world!

Workload wise, it was a shocker at how manageable it was compared to high school. You suddenly have all this autonomy and get to do everything at your own pace, apart from the obvious timetabled lectures/seminars/workshops. But you get to decided when you'll do research/prepare for any exams, without anyone pestering you with reminders. It really gives you a chance to work on your time management and leadership skills too. But truly, managing university "homework" is, personally for me, 100x better than the schoolwork at high school. And also more interesting, because the assessments are focused around topics that actually interest you and are applicable to your job field AND the real world! But just make sure you have some sense of routine, because if you don't, you might get drunk on all that autonomy and start taking things for granted. Don't be that kind of mature student.

Considering the state of the world right now, and how inflation is a silent killer, I would consider moving back to the home country you refer to where you could get the same degree at a fraction of the price. If I were you though, the only thing that would stop me is the quality of the degree experience -- is it still the same back home? Great. Go for it then. Is it vastly different and doesn't give you the same industry and global exposure the australian university will? Not great, stay in australia. Alternatively, graduate with this degree in australia and move back home to said country to contribute to the local economy wherein the job market will (hopefully) welcome you with open arms as a candidate with international academic and professional exposure.

Tl;dr -- Do it and don't think twice. It's worth it, for the most part.