Complex sentence: When he first introduced his guitar skills into the show he wasn't very good, and the only song anyone has ever seen Jake play in the show is Deep Purple's "Smoke on the Water", and he once played it on Charlie's piano.
Split into simpler sentences: When he first introduced his guitar skills into the show he wasn't very good. The only song anyone has ever seen Jake play in the show is Deep Purple's "Smoke on the Water", and he first played it on Charlie's piano.