So I just found out that we were supposed to get clearance of prerequisites At the counseling office before we can register for certain classes. However, the counseling office is closed during the weekend so I would have to go 3 hours after my registration time to clear the prereqs. 
So the English class I want to take doesn’t have any prereqs so I’d be able to add that class. I wouldn’t be able to add my Precalculus or Biology class. So would classes fill up within 3-4 hours? I’m going to Moorpark College of that helps. The classes I want to take only have 24 spots and 30 spots left currently.