I'm Australian and I studied through two universities there. First by attending one, then living on campus at another, then by distance education. Most of the time I've lived overseas (England and Ireland) and studied by online and distance education modes. The University of Southern Queensland offers a lot of distance education courses, so you could study from where you are, or return home and keep studying. Some majors have subjects you need to attend the university for, but a lot don't.
A lot of Australians don't have to pay upfront for their university. They can postpone the debt, so can go to university without paying anything and get student support type payments from the government. I didn't have to work when I was living over there. However, from overseas you will likely need to pay upfront and won't have government support, which may mean working as well.
I don't know the colleges you named but Early Childhood Studies might have some requirements to study on campus (if not completely). As for renting, I've never done it there but some of the universities have their own student accommodation, and it's different to renting a house of your own or a flat. It's optional though. If you have student accommodation, you usually don't need to worry about bills like electricity and water, and all. It's just included in the student rate. For some universities that includes a certain number of meals as well.
This is going to sound cold against my own country, but racism is common there. However, a lot of people aren't. I'd call Australia fairly safe, but take care walking around at night and anywhere isolated.