Complex sentence: He received his first music lessons from his mother, then in 1928 enrolled at the San Francisco Conservatory of Music, where he studied until 1931 before going on to study privately with Louis Persinger.
Split into simpler sentences: He received his first music lessons from his mother. In 1928, he enrolled at the San Francisco Conservatory of Music, where he studied until 1931 before going on to study privately with Louis Persinger.