@Kazuki "I would like to question, for the first month, does everybody gain few students and after a few months the students gradually increase? or the students increase immediately if the topic is right and the quality is high?" I don't think there a single, correct, answer to this question. It will depend entirely on whether you are a new author and it will depend upon the number of competing courses etc. The quality of the course probably doesn't come into play right away because students won't know about quality until they buy it and go through the course. Almost any new author is going to struggle at first. There are so many courses available on Udemy and virtually every topic that could generate a nice number of sales probably already has numerous courses already available. So, getting your course recognized could take quite a bit of time. Also, I listed to your promotional video. To be honest, this may turn some people away. First of all, the background music was very loud and it made it difficult to hear your voice. Secondly, your accent makes it a bit of a struggle to understand you. Students may just decide to find an instructor they can understand more easily. I'm not saying that a strong accent will turn everyone away. That isn't the case. But, with so many other courses to choose from, some potential students are likely to find a native english speaking instructor, if one is available. To be quite honest, I know I would if I had to devote too much energy to understanding the instructor.
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