The best and most direct ways to learn about a career is to

The best and most direct way to learn about anything is to do it hands-on; in this case that would mean getting experience with the career either by shadowing someone else, being an intern, or getting a job in that field. firsthand experience will tell you more than any amount of research could because, while the research may be accurate, it is not specifically from your perspective. 

The  knowledge gap  as been recast more recently as a “digital divide”  gap. with the internet and social media many things can be done faster and better. so much faster and better that those that do not have access to them are literally left out of the game.