The thing about being a writer is that few people are actually able to do it from the start. It would have been great to become a full time fiction writer right out of college, but even in the world of eBooks and Kindles, it's not that easy.
Most of us started out simply writing on the side when we have time. I once read that Stephen King writes for about two hours a day and I envy the King, but I have to work a full time job, various freelance writing projects for cash and write fiction on the few seconds I have on the weekends or late at night.
I can only imagine the number of amazing books and stories have disappeared into the deep recesses of my brain never to be recovered because I was stuck in a meeting or in traffic and couldn't get them written down. It's frustrating, but until I can become self sufficient on the book I will eventually write or the movie that will be made from my short stories, I'll have to just keep trudging along and perfecting my craft.
That's my goal. A writer's first book needs to be the best it can be. This will be the one that people will judge his quality and if they want to read any further works. That means pouring over every page again and again making sure every word of grammar is perfect and there are no plot holes, writing cliches or a million other common writing mistakes.