I should add this. Approximately ten years ago I took a course related to selling on Amazon. Online marketing was covered in detail. The course is no-longer available or I would recommend it. However, it did cost over $5K. Which is to say: Don't be afraid to spend money to educate yourself on sales and marketing. If you are an entrepreneur, it is well worth the money. Sure, there will be some courses here and there that aren't great. That's just the way it is. Don't give up on learning just because you didn't find the perfect vehicle the on the first attempt.