I'm not only an FB ad specialist but also a growth hacker, specialize in marketing, sale and business development. Last year, I did help an UX teacher develop his UX Design Course, his course costs 149$ per student for a week, really niche market. But with a right strategy for his start, he has now his own online academy.
I know you have ideas to start. That might work. There are a lot of tactics that we can use, but we can't use one-by-one until we run out of the idea to discount the course. More importantly, your business needs to be trustworthy, discount or free-the-first-one doesn't create that feeling. Let's set up a call so I can tell you more details how to help your business lives a long-life.