How do I enrol in a course? 

Find and open the course. If self-enrolment is available, select Enrol me. The course may ask for an enrolment key supplied by the teacher.

Self-enrolment must be enabled for that particular course. Some ELS courses add participants automatically from another university system, so no enrolment button is shown. If you cannot enrol, contact the teacher and provide the exact course name rather than creating another account.