Noob Question... How do I choose a company out of thousands of them? I'm not talking about the analysis and everything I'm talking about how do I know which company to choose?

For trading it's stocks.... I've struggled with this question, (I'm talking in trading by the way not investing) Even Chat GPT couldn't answer me it well enough. There are millions of companies to choose from which company do I choose? I can't go around performing fundamental analysis on 100 companies(or do people actually do that...?). Or people just randomly pick any company(I don't think that is the case...) Or do people go for the top 50 companies(This is what I think people do...). Buffet said invest in stocks of an industry or a company that you are familier with or know about it a lot. For example you work in the tech industry so you know a lot about tech companies, start there.... So that's one way to go about it. Is there any other ways? what can I say about analysis... I am figuring out how to choose company or sector itself. I'm still learning fundamental and technical analysis.