Yes you can change your course to another one after 6 months of your study in Australia. And it is highly recommended to change your course to the same level. For example, if you are a bachelor’s student, you can change it to another bachelor’s degree, not a diploma. This will breach your visa conditions and may lead to visa cancellation. Moreover, there are a few courses you can not change without ministerial approval.
19 – Can I change my course after 6 months od completing my current course?Tahmidul Islam