When your contacts sign up for your course, you need to send them a welcome email, followed by a series of other emails to nurture them until they complete the course.
To build your automation, you can allow a few minutes after opting in to your list before blasting your first welcome email, thanking them for subscribing to the course and including a brief of what they will learn from this course.
Then a few days later, you can send them an email talking about a particular lesson and the key takeaways that it provides. The email sent the day after will be different from the previous one, highlighting another lesson.
The good thing about these emails is that they can address segments who already started the course as well as those who have not taken any action yet.
** Note: Your automation will not work properly if you do not clearly set up all the required conditions.