One of my recent side projects was building an automated trading system for the crypto markets. To be fair, I probably spent more time on this than on my full-time job, so calling it a side project may not be completely accurate. The internet is full of people ready to teach you about trading. Most are trying to sell you something, and many are mistaking random chance for skill. Coming from a technical background in scientific research and software engineering, I tried to ignore anything with little scientific validity, like technical analysis, or anything that looked like marketing BS.
Source: Lessons learned building an ML trading system that turned $5k into $200k