Complex sentence: After graduating from high school, Del Rey was accepted to the State University of New York at Geneseo but decided not to attend, and spent a year living on Long Island with her aunt and uncle while working as a waitress.
Split into simpler sentences: After graduating from high school, she was accepted to the State University of New York at Geneseo but decided not to attend. She spent a year living on Long Island with her aunt and uncle, and worked as a waitress.