Probably not the perspective you're looking for because I am both brown and in art school, but I can say that daily practice, understanding the fundamentals, and building a portfolio are key.
For jobs, mainly the portfolio thing. Most shit/beginner/inexperienced artists can't ever finish something and just do sketches because they don't understand composition, form, perspective, backgrounds, etc. You'd need, at the very least, a collection of pieces that look polished, professional, and complete.
Social media following helps too. Bobby Chiu does a podcast where he talks to lot's of successful freelancers or even Disney types, and most have healthy social media presence and encourage aspiring artists to gain an online following as well.