How did you come to be a writer?

I received this question from a fan and thought the reply might be interesting to more than just the writer.  Here goes.

"You make some reference to enrolling in a community college writing class and riffing from there. It sounds like a starting point. Could you tell me something more about how you made your way from less-than-concrete ideas in your head to a dialogue-less story about the demise of the Second Coming to writing up successful treatments? Practice and having somebody to tear...