Let's put it this way: if you are a novelist, I think you start out with a 20 word idea, and you work at it and you wind up with a 200,000 word novel. We, picture-book people, or at least I, start out with 200,000 words and I reduce it to 20.
People who say they're not nervous - I would be kind of curious to see how successful you are at what you do and how long you've done it. And what is success in your eyes? Have you separated yourself from everyone else in that craft? Or have you settled amongst the pack?