You should have received an email containing a link to the self-registration form. After you fill out the form and select a password, you will receive an email with your username and be enrolled into your courses.
You should have received two separate emails containing your username and password to log into your course.
Note: If you haven't received an email, check your junk mail folder for it.
For any other query, send an email at: firstname.lastname@example.org