After being scammed by a trader guru, I considered starting my own course-selling business. LOL!!
The funny thing almost all of the courses that are being sold on the platform are already available on free sites with much better instructors. And some are so good that they interact with the audience in the YT comments section.
CodeWithHarry, TradingLabs, and many dedicated YouTubers publish quality content with clarity.
But there are some pro-level courses available which as you mentioned should be joined only after consulting