Such an excellent article with so many good takeways I could have underlined the entire essay.
My only stint as a full time writer was the two years I spent as a newspaper reporter. But my other jobs that had nothing to do with writing gave me a great respository of material and the experience to deepen my writing.
You are tremendously talented and I believe you'll succeed beyond your wildest dreams. Don't get discouraged, because everything you do is fodder to drive your talents in the right direction.