Complex sentence: When Gregory departs on a lengthy lecture tour, Rose embarks on a crash course in self improvement: she diets, exercises, changes her hairstyle, learns to use makeup, and outfits herself in an updated wardrobe.
Split into simpler sentences: When Gregory departs on a lengthy lecture tour, Rose embarks on a crash course in self improvement. She diets, exercises, changes her hairstyle, learns to use makeup, and outfits herself in an updated wardrobe.