How traders beat FOMO - psychology of traders who are good at losing

If you want to make money in trading, what principles do you need to understand?

What kind of system can accurately locate support resistance and trend when doing transactions?

What are the common operating modes of thousands of trading studios, and how do they support themselves?

I partnered with a friend to do asset management for a year, and then it all collapsed. Is there any colleague to share with you? I also want to try again, before I try, I would like to ask everyone's suggestions and experiences

As a "trader", what trading discipline do you have to restrain yourself?

In the past few months, I feel that the more I study, the more I study, but it will decline. Sometimes I feel conflicted. I don’t know why?