Complex sentence: By this time he had begun to take his music more seriously, jamming at local clubs, and in 1955 was invited by Clifton Chenier to sit in with his new band, the Zydeco Ramblers, at the Blue Moon Club in Lake Charles.
Split into simpler sentences: By this time he had begun to take his music more seriously, jamming at local clubs. In 1955 he was invited by Clifton Chenier to sit in with his new band, the Zydeco Ramblers, at the Blue Moon Club in Lake Charles.