You can always find your own courses from the Create Course link on the navigation.
Alternatively, you can find them by clicking Courses from the navigation, then clicking the "Show mine" toggle switch to show yours only.
Don't forget - the courses screen is filtered by your currently chosen languages. Select the language selector and choose "All languages" to view them all.
Note: Your courses may not always be found just by clicking on the Courses page. Memory has thousands of courses, and the rankings are updated every 30 minutes based on popularity, user trends, and your own search history etc.