The choice of any course, and not just a trading course, should be based primarily on who the author of these courses is. Just as an auto mechanic can't teach dentistry, so a trading teacher must have the appropriate education (or knowledge) and experience in this field of activity. Therefore, the best strategy is to initially collect information about the author of this course. What background and achievements does he have, is selling courses his main source of income (if so, what can he teach in trading if he himself is not able to make money on it). Also, you should not blindly believe in what the author writes about his course (promoting text) or reviews of others (on the seller's website). It is advisable to search for all the information on third-party resources that will allow you to get the most objective idea about trading courses and its author. But in general, there are a lot of deceivers and scammers in this area, so you need to be careful when choosing.