Complex sentence: The garage was the perfect place to build a song repertoire because it was free and available and in a closed garage with Fender amps cranked up to ten, practicing songs popularized by bands like the Rolling Stones sounded like British heaven.
Split into simpler sentences: The garage was the perfect place to build a song repertoire. Besides, in a closed garage with Fender amps cranked up to ten, practicing songs popularized by bands like the Rolling Stones sounded like British heaven.