A Studnet and a Manager
Assuming I am a Teacher on a certain course and at the same time I am student at another course.
How should I enroll to a course? The only option I have is to login as a Course Manager...
The student experience is only available for iPad. Login to iTunes U on your iPad, and tap "+" to enroll in a course as a student.
In the tab bar at the bottom of the screen, you should see an "Instructor" icon. If you tap that, you will see the same course list you see in Course Manager.
Does that help?