You can enroll customers directly into your online courses just by entering their email address. They'll receive an email that they're now enrolled.
Step 1: Go to Products
Step 2: Enroll the customer
Click on the three dots to pull up a menu with various options:
Click on "Enroll customer".
A window will pop up asking for their email address:
Type in their email address and click "Yes, enroll this customer" to give this person free access to your online course.
Your customer will get an email that looks like this:
All they'll have to do is click the link to set a password. If they already have an account with you, they'll receive a welcome email instead with a link to login.