You can’t see My Grades.

Your My Grades icon should appear on your course toolbar, if it has been enabled by your instructor. If you do not have a My Grades icon, please contact your instructor to request that it be added to the toolbar. Also, note that specific assignment or quiz grades can be seen within the particular tool. For example, to see a grade on your quiz, go to the Assessments tool (if enabled by your instructor), and look for your grade in the Grade column.