Complex sentence: She left public school in the fifth grade to be homeschooled, began drawing comics seriously at age 15, and soon after her 19th birthday she self-published "18 Revolutions," the first American graphic novel ever made by a teenage girl for teenage girls.
Split into simpler sentences: She left public school in the fifth grade to be homeschooled, began drawing comics seriously at age fifteen. Soon after her nineteenth birthday Nabors self-published "18 Revolutions," the first American graphic novel ever made by a teenage girl for teenage girls.