I Worked as a quant for a few years, but in a certain point moved to data science and lost interest in stock market.

Read many technical and non technical books, and I recommend this one - Berton J Malchiel - A random walk down Wall-Street.

Simple but not simplistic, it has some great useful lifelong tips for investment. I follow it's advice for >10 years - from 2008 crisis, until these crazy days.