It should be something that comes from your heart, something you're emotionally attached too or something that you find passion about.
He was inspired by the art of Pablo Picasso and Julio Gonzalez. During his early years before he became an artist he also worked in an automobile factory where he learning soldering and spot-welding techniques. He then started to mix his technical knowledge and art to create art.
I play piano, and I honestly think that if you can consistently practice and get a good foundation, you can become a decently good player. If you have a music room or music department in your school, you can ask to borrow their piano and go their in your free time. Or, you can ask your family again or come up with the money itself. Good luck on your piano journey :)
