Complex sentence: As a child she wanted to be an actress, singer and dancer and was part of the drama club in middle school and high school, but dropped in the 2nd year of high school because she was not good at dancing.
Split into simpler sentences: As a child she wanted to be an actress, singer and dancer. She went on to be part of the drama club in middle school and high school, but dropped in the 2nd year of high school because she was not good at dancing.