Hi @Dr. Martin Karnolsky, nice! Glad you figured out how to use coupons and referral links. You can also learn how to make the most of them in this article if you're interested in some marketing advice.
In regards to your course topic, beloware the search results for your course's current topics:
However, If while creating your course you already tried searching for a topic in our list of topics and you can’t find one that is appropriate for your course, you may suggest one to us. You can learn how to do this here.
If you still require further assistance, feel free to reach out to the Instructor Support team and they'll be happy to help! 😊