You just rock up for the MCP to the location. The head of the course will have a list of your names (try and have your student number memorised because you'll probably need that to sign in). Enroll in all your units as per the handbook codes for the Autumn session. Don't worry about Spring session yet, you'll do that after first sem. Also make sure you make a draft timetable based aroud the times that lectures, tuts and labs are for each unit. When enrollment opens at the 9am whenever it is, it is hectic and places fill quick. If one spot gets taken don't stress just keep enrolling in other units. You can email head of units after enrollment to deal with conflicts