In college I had a weekend gig at a restaurant, a solo thing that was the best practice I could have ever had. That's where I learned to coordinate my singing and my piano playing.
When music fails to agree to the ear, to soothe the ear and the heart and the senses, then it has missed the point.
The reason I wanted to be an actor is that I don't want to play me for the rest of my life and make money out of that.