Complex sentence: It all started in Sydney, when Nicky Zimmerman who attended the design school at East Sydney began designing garments from her parent's garage and selling them at Paddington markets where she could see first-hand how women responded to her clothing.
Split into simpler sentences: It all started in Sydney, when Nicky Zimmerman who attended the design school at East Sydney began designing garments from her parent's garage and selling them at Paddington markets. Here, she had the opportunity to see first-hand how women responded to her clothing.