When I went to college, I would have majored in music had I known how to play the piano... but I didn't want to spend my college career in a practice room learning how to play piano.
You're right about languages. There's something in our genetic makeup, our DNA, called LAD (the Language Acquisition Device) that functions to help us learn language. By the time we are 12, the LAD is diminished greatly, and language learning becomes a different process altogether. When I was growing up, the theory was NOT to teach children another language early because it was thought the children would get confused by more than one language and would end up not being able to sort them out. It turned out that theory was the opposite of the way things are. The more languages we learn in childhood, the easier it is to learn and the better we will learn, speak, and retain them.