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I am not sure of anything, you can definitely succeed in poker but you’ll you need some technical and mental skills. I have a list of courses that focus on both. But if you want to succeed, you need to apply what is taught. Plus, I do think that a course is not enough: you need a study group so you can reflect on your plays on a regular basis and to work a lot on yourself.
So basically the course that you offer does not guarantee anything as it will depend on the individual's technical and mental skills. Also, you, yourself think that the course that you offer is not enough for anyone to succeed on Poker. You also, think that each individual will need a group to play and be better on their Poker skills and techniques.
Basically, An individual does not need your poker course rather they will need a group to study Poker skills and techniques to be good and succeed on Poker.