I highly recommend Ultralearning [1]. It does not talk about hours required to learn something, but how to define your goal, plan out the study, and then immers

I highly recommend Ultralearning [1]. It does not talk about hours required to learn something, but how to define your goal, plan out the study, and then immerse yourself into the task. https://www.scotthyoung.com/blog/ultralearning/ https://www.scotthyoung.com/blog/ultralearning/