Complex sentence: As a young woman she worked as a nursery teacher and took other part-time jobs; but began writing in her twenties and had several stories published in magazines, such as "Woman's Own" and "Jackie".
Split into simpler sentences: As a young woman she worked as a nursery teacher and took other part-time jobs. She began writing in her twenties and had several stories published in magazines, such as "Woman's Own" and "Jackie".