The way to expand your creative mind and abilities is to do something creative.  I think it’s very useful to learn to use your medium of choice, but I think it’s more important to develop your confidence.  You don’t need expensive art supplies.  You don’t have to use all of the supplies properly.  You can draw on the wall of a cave with a stick from the fire.  The urge will turn to passion as you become comfortable with your artistic voice.