Complex sentence: McCook's interest in drag began in 2006, shortly after he graduated from Marlborough High School and began attending the Massachusetts College of Art and Design, where he did video and performance art in the Studio for Interrelated Media (SIM) program.
Split into simpler sentences: McCook's interest in drag began in 2006, shortly after he graduated from Marlborough High School. He began attending the Massachusetts College of Art and Design, where he studied video and performance art in the Studio for Interrelated Media (SIM) program.