Wait you know the 2000 and 3000 units arent they for year 2 and 3? Why are they in blue and why are the session options like so for ex MEDI310P = '2021 Session 2, North ryde, Day' literally as the only availability ¿¿¿
Generally, you do 2000 in 2nd year and 3000 in 3rd year. You can vary this a bit if you meet prerequisites though. BUT -- the reason you are seeing this "2021 Session 2, North Ryde, Day" is because it is showing the availability of that unit for 2021. It is listed on your study planner as you need to complete it to complete your degree, and it is showing you the availability for the upcoming year. When it comes to enrolling for 2022, it will update and show you availability for 2022 semesters/locations. Etc.
OH WAIT IT SAYS I GOT ENROLLED BUT REGISTRATION FOR CLASSES ARE CLOSED AND NO MORE CLASSES ARE AVAILABLE
Yep, enrolling in units and registering for classes are two separate processes. Class registration is not open yet. You'll probably get an email close to when registration opens reminding you and telling you what to do, otherwise dates and tutorials are online
When it comes time to register, it may occur that all classes will appear as full. If this happens, don't worry. The course co-ordinators add more classes when this happens to ensure all students who need to complete the unit are able to.