Complex sentence: Powell took to his father's instrument and started to learn classical piano, at age five, from a teacher whom his father hired; but by age ten, he had also showed interest in the jazz that could be heard all over the neighborhood.
Split into simpler sentences: Powell took to his father's instrument and started to learn classical piano, at age five, from a teacher whom his father hired. But by age ten, he had also showed interest in the jazz that could be heard all over the neighborhood.