From the University of Sydney:
"If you do not have the assumed knowledge for your course, we strongly recommend that you undertake bridging studies. Otherwise, you might find it difficult to manage the work, as your lecturer will assume you are familiar with this area of study. Bridging courses are also useful if you struggled with the subject in high school, or need a refresher."
Wouldn't it be a bit early to think about bridging courses in your case?