As you log in you will see all classes that are being taught in AUA
Go to My courses, which is from left side under Home panel
Choose the one that you are teaching if you are an instructor
Choose the course and enroll yourself if you are a student
Do not forget to fill in your personal information in the Moodle. Go to My Profile, it is under Administration, click on Edit Profile and fill in the required fields. After finishing click on Update profile.