Too many courses in your list? You can decide which courses are shown.
After logging into Blackboard, find the My Bb Learn Courses module and click on the gear icon in the top-right corner of the module:

This will take you to a menu which lets you decide which courses are shown, and in how much detail.
Group by term
At the top of the menu, you may notice a setting which groups courses by term:

This is optional, but highly recommended.
Options for each course
The full menu contains one row for each course:

If you enable the course name column, the course will be shown on your home page. If you disable that column, the course will be hidden.
Other columns that you can toggle include:
- Course ID
- Instructors
- Announcements
- Tasks
Changes are not saved immediately. Once you are done updating your preferences, find and press the SUBMIT button to save your changes.