https://akunacapital.teachable.com/
Start here. If you do well, they'll invite you for an interview. Be aware that the stuff is not easy although it's only the 101. But at least you know which direction you have to look for.
Professional trading is all about replicating cashflows to find edge in price vs. value no matter where you look.
A fundamentally oriented fund might figure out the value of an asset through sheer research power ("the big short") a market maker might only be interested in queue position.
Learn the math, learn the instruments, trading rules and stop guessing. Then you might have a carreer.
An example:
1. If the corporate bond trades at 80cts on the dollar and the market cap of the company's share float is 0.5 times its cash position, can you make money from this and how would you structure a trade?
2. If a 100$ stock is under short sale restriction and the 100$ option combo for 30 days trades 50 cts below cash, can you make money with that information? Where are the risks?