Fantasy is totally wide open; all you really have to do is follow the rules you've set. But if you're writing about science, you have to first learn what you're writing about.
Octavia ButlerPeople who want to write either do it or they don't. At last I began to say that my most important talent - or habit - was persistence. Without it, I would have given up writing long before I finished my first novel. It's amazing what we can do if we simply refuse to give up.
Octavia Butler