Pizzetti wrote several books, mostly of musical criticism (he co-founded a journal of modern music, Dissonanza in 1914), but notably also a biography of Niccolò Paganini. His music is lush, diverse in terms of what he asks of his orchestral players, and sincere. It fits well with the times, being not all that dissimilar to the beauty and drama of Claude Debussy and Vaughan Williams; and it yet fits even more perfectly into the history of Italian sacred music and operatic canon. A true delight to discover him here.
When it comes to organizing the structure of your song, where and when certain sections come in, and the roles they play as your song develops, there are a few ways to go about this. Some of the most common types of song forms are just variations of verse, pre-chorus, and chorus, with the occasional bridge or solo thrown in, especially in pop music.