Complex sentence: Shirman's success in the music field was obvious almost straight away: he began composing music when he became 8 years old; and when he was 14 years old, he had released his first album "Get Funky", sold by over 500 copies.
Split into simpler sentences: Shirman's success in the music field was obvious almost straight away. He began composing music when he became 8 years old, and when he was 14 years old, he had released his first album "Get Funky", sold by over 500 copies.