If you have a big book inside you, it need not take a year or even five, to write. Anthony Burgess wrote A Clockwork Orange in 3 weeks!
While I don’t have any illusions of being able to duplicate that feat, it does give me something to think about. When I think about writing an amazing book, a book that changes the world, I always figure on a year minimum to write it. There is never any guarantee of success, in fact, you have less than a 1/100,000 chance of writing a great book, no matter how much energy, time, sweat, and tears you put into it.
When I look at it like a year project, that might go entirely to the birds, I just cannot get very excited about the idea. However, if I look at it as 3 weeks, a month, 2 months… then it becomes almost worth it to try. It might be a wasted effort, but at least it wasn’t an entire year wasted! At this age I don’t have too many years to waste. Neither do you.
Write something big next time. Challenge yourself. Make your head spin.