Everyone in the "allied arts" as they used to be called must read the book,
THE CULTIVATION OF ARTISTS IN NINETEENTH-CENTURY AMERICA edited by Georgia B Barnhill.
It explains how trade schools trained anyone who could draw with skills to job the burgeoning industries that hallmarked the era about which it is written.
Artists where taught to cut images onto copper plates and lithography stones to illustrate the newspapers, periodicals and publishing house flourishing in that time. Think about it, who drew all those lovely cross-hatched scenes, portraits and products before photography was used in print? Commercial artists. And how did they get trained? Through the apprentice system, until it was compromised by bigger and bigger industry.
So, you think you’re so special? Read this book.