Complex sentence: Actress Cassie Fliegel, who is 5' 11, auditioned for the part anyway, and after getting a callback went to a gym to workout, attempting to gain muscle to look more like a basketball player.
Split into simpler sentences: Actress Cassie Fliegel, who is 5' 11, auditioned for the part anyway. After getting a callback, Fliegel went to a gym to workout, attempting to gain muscle to look more like a basketball player.