So, choosing a course is important as we have two types of students mainly coming to Australia one type of student being coming here mainly for studying for certain period collecting skills and finical resource to go back to their home country. Another type is one who is here for migration purposes they plan to study for a few years see how it goes and decide to live here in Australia.
So, it is important to know which type you want to fall in. If you do decide to get PR in Australia, you have some limitations in course choice as a subject within the SOL list (Skilled occupation list) are to be eligible to plan for PR after studies. And, even if your subject is in SOL, you must gather extra points to qualify for the process. This Qualification process can have tough criteria and the subject might change as per the demand of the workforce in Australia.
Also, while choosing the university, you want to make sure the area you want to live in as well. As all the universities and institutes are scattered throughout Australia and if you are planning to go to a particular college or a university you might either go to that state where the university is, or you can ask if they have colleges in other states as well. You also must see what the future scenario of this is filed as some courses might be cheap but have no real scope which can often lead to other problems down the road. Therefore, it is very important to give a thought about these various questions in your own country when you still have time to think about it.