Hi Katelyn Alverdi Welcome to the Canvas Community.
You can hide courses, or not have them visible on your dashboard, by using the following guide:
How do I customize my Courses list as a student?
or just change them around by using this guide:
How do I view my favorite courses in the Card View Dashboard as a student?
However, if you are a student you cannot remove yourself from a course unless you ask your instructor.
I hope this helps.
Retrieving data ...