I have competed successfully in a competitive topic without a following and only a limited (<10%) number of students coming from self promotion. It is possible to compete with the big fish but it's a long game especially in a niche topic. I would still continue at the end of the course building exercise you have content that you can launch on multiple e learning sites (although I do admit udemy is one of the better) but it is a way to grow revenue. Everyone starts somewhere.
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