Worry and doubt can actually be prayers and visualizations—and self-fulfilling programming—for things you do not want. The world is your mirror. Everything is created twice. What you have running in the programming of your mind eventually manifests itself in the outer world.
So if you want to change your outer world, you must first change your internal mental programming. When you try to change the external world first, it's like trying to change the picture on a TV screen by rubbing that picture with a cloth. You can rub, and rub, and rub—but it's futile, baby.
However...when you change your mental programming—who you are thinking you are and what you are thinking you deserve—you find the world around you changes simultaneously.