The piano is a great instrument because of how easy it is to pick up on it. Unlike other instruments like the violin, or the guitar, you always know what you are going to get when you attempt a note. It also sounds amazing to the ear and is very relaxing to the ear.
Development time is a chemical film process not a digital process.
It should be something that comes from your heart, something you're emotionally attached too or something that you find passion about.