This article explains how to enroll a learner or multiple learners in a course.
From the admin menu, click "Enroll user(s) in a course".
Search and/or select the learners that you would like to enroll. Then, move the names from the left box to the right box. Click the next button.
Select the course(s) you would like to enroll the learners(s) in. Click the next button.
Select if you would like this enrollment to be reoccurring. If you set this feature to yes, you'll need to fill in the re-enrollment dates. You can also assign a due date for the enrollment. When you have this page filled out, click the finish button. The enrollment is now complete.