Info on Graphic designing career and sketch art?

Can anyone tell me the specifics about a graphic designing career? I like sketch art, but I'm not sure if I can rely on sketch art as a career. Maybe a side income. So i'm researching careers in the art field. And I'm seeing alot of careers in graphic designing. I just need some info as to what is... show more Can anyone tell me the specifics about a graphic designing career? I like sketch art, but I'm not sure if I can rely on sketch art as a career. Maybe a side income. So i'm researching careers in the art field. And I'm seeing alot of careers in graphic designing. I just need some info as to what is needed to do in that field and the salary.
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