Expertise isn't something you need to start a career, it's something you gain over the course of a career. Figure out the minimum necessary skills to enter a ne

Expertise isn't something you need to start a career, it's something you gain over the course of a career. Figure out the minimum necessary skills to enter a new field and focus on developing those skills. Even if you did spent the (completely mythical, made up) 10,000 hours, you'd likely be wasting a lot of time if most of those hours aren't in the actual profession, as opposed to some detached academic hobby.