Complex sentence: Starobin started playing the guitar at the age of seven, studying first with Manuel Gayol, and then with Albert Valdes Blain and Aaron Shearer at the Peabody Conservatory.
Split into simpler sentences: Starobin started playing the guitar at the age of seven. He studied first with Manuel Gayol, and then with Albert Valdes Blain and Aaron Shearer at the Peabody Conservatory.