Gordie,
I have a wonderful musician friend who plays by ear only. He improvises and composes and never fail to amaze me with his talent. He has started dabbling with piano even when he was a kid. However, I am not sure if you are able to learn everything by yourself. It is a tedious and long process. And if you want to play someone else's music, like Einaudi's, then it is easier to learn it through music reading. As nanabush says, learn to read at least, at a basic level. It does help to open up your musical world to another realm. Imagine all the music that you can learn to play correctly, all just by reading!
Good luck!
PS. You're not rubbish, but a gem in discovery!