Well, I still need a course, and the courses i'm interested in are all full.

Is there usually people switching out of courses around this time, or is it hopeless to get into full courses by now?

I got into a full class like 2 days ago, so its not too late, plus im guessing a lot of people are gonna be switching first week since they might not like the classes they are in...

im in the same situation as you
hopefully it turns out like the first term where seats opened up during the first week

After the first week alot of people drop courses so just keep checking

You still have until the Add/Drop deadline of Jan 11th to get into the course, and many people drop classes during the first week of the term.