I have wanted to write for some time now as well. I've spent endless hours daydreaming about it. And the the dark clouds fill the sky and I come back to reality and ask myself exactly when do I plan to have the time to do it? The answer, NOW. I'm not an experienced writer, heck I never even wrote for my school newspaper and did'nt even do to well in my college literature classes writing papers. But at the end of the day that does not matter. We get better the more we do something, whether its writing, singing, painting, or anything else. Do it for the joy. I joined my church choir last year after prodding by a friend and I could not even read music. I'm learning and in the process I found out I have a pretty good voice. I never would have known if I did'nt try. As far as what kind of book a publisher would want, who cares? Write from your passion whatever it is because the best things come from your heart. What are you passionate about? Trying to formulate your writing to fit someone elses idea of what the public wants would only hold you back.
So GO FOR IT! You may stop and start 100 times, but thats okay great things take time, and perseverance.