With academic registration, there is usually no rush, and most departments and student associations orient freshers. The orientation organized by the school at the Great Hall for freshers is a great avenue to clear your confusions.
For your academic registration, open your MIS web and go straight to the “Registration” tab. There, you would have to choose the courses you would be reading in the first-year of the first semester. The course codes which end in odd numbers are for the first semester. If you aren’t too sure, just ask a continuing student who offers your programme.
If you’re able to finish the academic registration, print it out. You would need it for your manual academic registration.