There was a book called Play the Bach, Dear! that was about a girl who hated the piano and ended up having her teacher lie (lay?) inside the piano during her recital and play her piece for her. It also mentioned her teacher living inside her piano in her apartment.
Not very inspirational.
There was also a book called Broken Chords that was about a girl in a who was a maniacal practicer and a prodigy. She was doing very well in a prestigious competition, but broke her wrist during ballet and discovered that she had absolutely no passion for the piano. She loses her boyfriend and nearly her mother's love because of her decision to quit.
Not very inspirational either.
Another book is titled Ying the Youngest and his Terrible Ear. It's actually more of an "East meets West" story. The Chinese boy (Ying) comes from a family of musicians but has no sense of pitch. However, he hits fastpitches and curveballs well. Predictably, he meets an American boy who has no desire to play baseball but has aptitude for music. They become friends, they switch fields, the "young person" is exposed to cultural differences, the end. I suppose one could be inspired by the American boy who wanted to play the violin, but his desire has no prominence in the book.
Not as uninspirational as the others, but not inspirational either.
Most "young people's" books or coming-of-age stories that I've read are about discovering that one does not like their instrument, possibly because publishers do not believe that any "young person" can relate to a character who loves her instrument to bits.