they want you to come on the proper day.
i went on the AAS teaching day coz i wanted to get it over and odne with..woman went no, go on the proper day and she refused to help me at all. Maybe i should have turned on the helpless persona...but i tol dher i was a current student-mustve out her off or something.
you can enrol on anyday but you might need academic advising about what you need to do in your course, usually applies to tafe/uni/mature people. if your just from yr 12, than just get your enrolemt form and fill out the other forms and hand them in. Orientation day is still another day that repeats what the AAS was about with a bit more info.