Any advice for wannabe writers?
Write every day. It doesn't have to be good or interesting or grammatically correct. Just write anyway. It will keep your juices flowing, and I guarantee that by the end of each session you will have at least one good sentence that you can use in the future.
Read a lot. And read the stuff you like, not the stuff you think you should like. Because chances are you will write in the genre you like to read. So it's important to know how other people are doing it.
Carry a little notebook everywhere you go. If you see something funny, write it down. If you meet someone with a cool name, write it down. If you think of an interesting story idea while you're on the bus, write it down. Get it? So the next time you're racking your brain for details or ideas they will be right there in your ah-dorable little notebook.
If someone tells you you'll never be a writer, put on your pointiest boots, take a deep breath, and kick them in the shin.
Write about that!