Hi David,
Thanks for getting in touch!
There’s a couple of ways you can access reports for your courses.
The first is to access the individual report of each course. You can find those by clicking on the “Attendees” link underneath the course title in the WordPress Admin:

The second is to get a snapshot of ticket sales across all events in the WordPress Admin. For that, I would recommend installing the Advanced Post Manager plugin. That will give you a number of items you can add to the list of events in the admin, including Sales and Stock. Here is how that looks when installed and configured:

Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff