Nai Zi Ge is learning how to invest this way, and I'm not sure if it's correct. You can learn while doing and improve along the way:

1. Study a vast number of brilliant investors and traders.
The top-tier ones are Buffett, Munger, Duan Yongping, Soros, Simmons, Howard Marks, Ray Dalio, etc.
The mid-tier ones include Carl Icahn, Paul Tudor Jones, Edward S. Thorpe, Bill Ackman, Michael Burry, etc.
The beginner level includes traders and investors similar to those described in "Financial Wizards" by Jack Schwager, as well as some relatively well-known cases we can find online.
This step mainly involves extensive reading—looking at various types of people, cases, stories, flipping through every page.
2. Study specific cases.
For example, Buffett's investments in See's Candies, Coca-Cola, Apple.
Munger's investments in Costco, Alibaba.
Carl Icahn's investment in Netflix.
Bill Ackman and Michael Burry buying options to hedge and short the entire market.
The more cases, the better; the more detailed, the better. Ideally, you should know which financial products and tools they used and be able to immediately replicate them.
3. After learning specific cases and forming a clear logic, be sure to try replicating with small amounts of money. Run through all the operational tools in these cases because there's a big difference between just learning and manually trying to execute and understand the entire process. Many small details need to be personally verified and understood. Don't just rely on a vague sense of understanding.
4. The most important thing is actually one thing.
Find your own interest and pursue lifelong learning.