Wallpaper would be a perfect way to add color and texture to your room. A textured or patterned wallpaper would give your room character. You said that the light fixture is changing. Can you give pictures of the new one? And pictures of the new nightstand would also be helpful in showing what style you would like for your bedroom. In your pictures, the curtains in your bedroom were closed. When they are open, is there plenty of natural light? If there isn’t much natural light coming through your windows, you may want to consider a lighter colored wallpaper. If you have plenty of natural light, the choices are infinite. Keep in mind that the darker the wallpaper, the smaller the room feels.