Your growth as an artist and as a human being lies in the constant development of your instrument, which includes your instincts, your mind, and your storehouse of knowledge. It is a series of victories — sometimes small — over fears and doubts. Through practical advancement and application (that is, by doing rather than talking or fretting about), it is the continual building up of that list of things that change from “I couldn’t possibly” to “yes, I can”. You might never be among the ranks of the great singers but, by gum, by taking it on, you will be better and not afraid to do it when the circumstances call for it. You will become better and better prepared, more directable, and more marketable.