I created a Loom video to explain the process. https://www.loom.com/share/9b24622bb11841ccb364c54405d2fbc3
Basically, after purchasing on AppSumo click the Redeem Now button on the purchase confirmation page. This will generate an AppSumo code and take you to a form to redeem that AppSumo code. Complete the form and an email will be sent to you with the instructions for accessing the course you have just purchased.