She signed up for year, found a small apartment to sublet in the theater district in short order, and used her downtime to work on one of the fantasy novels she’s writing, in a series called “The Gemeta Stone”; “Kinglet,” the first, is now out. Time, though, was short in those first weeks, as she learned the music and the dialogue, acted as a stand-in for LuPone during some technical rehearsals in the Nederlander Theatre, and even earned a compliment from LuPone on her vocal skills. “She came up to me and said, ‘I heard you singing. You’re amazing!’” Migliaccio recounts.