Complex sentence: As a child actor, Irvine honed his performing talent from an early age and learned the classical guitar, a skill he later applied to playing the songs of Woody Guthrie, also adopting the latter's other instruments: harmonica and mandolin.
Split into simpler sentences: As a child actor, Irvine honed his performing talent from an early age and learned the classical guitar. He switched to folk music after discovering Woody Guthrie, also adopting the latter's other instruments: harmonica and mandolin.