In the left column of the courses display you find various terms that you can use to filter what courses are shown. There is also a search field.

Some of the filters, like
all           show only the courses you are enrolled in
my          shows you all available courses & events
certificate gives you courses you have received a certificate for

Under the heading CATEGORIES you can filter out courses by 'personas' [some more explanation here…]

At the bottom of the list are filters for [whatever we call these 'category' nowadays and what they give you]