Complex sentence: His first musical performance in the winter of 1967 was with The Reign, and after that, with "Johnny and the Jaywalkers," under the name Johnny Volume while a student at Quintano's School for Young Professionals.
Split into simpler sentences: His first musical performance in the winter of 1967 was with The Reign. Shortly thereafter, he played with "Johnny and the Jaywalkers," under the name Johnny Volume, at Quintano's School for Young Professionals.