Complex sentence: Midas King began his career as a young ambitious school boy who has a clear vision about music as a career, he was once a backup singer, a member of a defunct music band formed by him and some other of his high school classmates.
Split into simpler sentences: Midas King began his career as a young ambitious boy who had a clear vision about music as a career. He was once a backup singer, a member of a defunct music band formed by him and some other of his high school classmates.