How to Learn About an Industry

How does one go about learning new industries slash? sectors and how to analyze companies in those industries. Is that a matter of reading 10k's or is there more to it? I think you can learn a lot about industry if you just pick a group of stocks in that industry So maybe it's competitors to the company that you are interested in and you'll learn a lotAbout the industry from doing that Next question in a dividend discount model. I think you should add debt for that next question How does one goabout learning new industries Slash? sectors and what do they look like? Read phil fisher and read peter lynch Those two are the best at explaining how to learn about an industry