Self enrollment is the method where users can choose to enroll themselves into a course (provided the course is established with this setting), either by clicking "enroll me in this course" or by typing in an enrollment key they have been provided. 

1.  Go to the Moodle Homepage.

2.  Login with their LSUA credentials.

3.  Search for the Course they want to self-enroll.

4.  Select the Course and then select ENROLL ME.