In 1924, 11-year-old Filipina immigrant Angeles Monrayo started a diary because “I would like to read about me — what everyday things happen to me — when I am an old woman.” Nearly 100 years later, the San Francisco Girls Chorus is sharing Monrayo’s memories of her life as an immigrant through music and song. It all starts Saturday with the Tomorrow’s Memories Community Book Club, the first of a series of monthly virtual and outdoor events that will get audiences talking about the SFGC’s upcoming commissioned choral opera about Monrayo’s life.