Complex sentence: Although Beemer had the right voice and had made many public appearances as the Ranger, he had no experience as a film actor, and it would be nearly impossible for him to take on the television role while doing the still popular radio series.
Split into simpler sentences: Although Beemer had the right voice and had made many public appearances as the Ranger, he had no experience as a film actor. Besides, it would be nearly impossible for him to take on the television role while doing the still popular radio series.