I know it's an older thread, but was scrolling down and saw the title, and had to say you did Deep Purple properly!! Great job Robert. Very impressive.
You definitely have potential as others have said, and as I have learned (because I had no potential when I started lol), anyone can sing with practice and dedication. Keep practicing and exercising those muscles!
Solid job! A few years back when looking for a new instrument to learn, it was either going to be Banjo or Piano, and chose banjo, but watching you made me wish I would have selected otherwise. :)