You will make a difference in the world, but not immediately. Your first obligation is to find something you like doing, because if you like doing it, you'll do it well.
I've found that when I'm having trouble solidifying a character or a scene, that music will often free my subconscious just that last little bit to allow me to move forward, and often it's in a direction that I didn't expect, but is 100 percent true to the character.