Between “sandbox” (development) courses you create yourself, or “official” courses generated by the college, most instructors will inevitably have a large number of courses in Canvas.
It’s easy to have your most used courses readily available on the Dashboard and Courses list, while keeping others out of sight but still easy to get to when needed. The secret is the star.
See the Canvas Guide:
How do I customize my Courses list? (including the Dashboard)