Complex sentence: In London, she took an advanced cooking course at her mother's suggestion, although she never became an adroit cook, and worked as a dance instructor for youth, until a skiing accident caused her to miss three months of work.
Split into simpler sentences: In London, she took an advanced cooking course at her mother's suggestion, although she never became an adroit cook. She worked as a dance instructor for youth until a skiing accident caused her to miss three months of work.