Complex sentence: At an early age, she gained success in competitive curling and was only 19 years old when she won the first of her 16 Nova Scotia curling titles that led to competing in the Canadian championships where she finished second.
Split into simpler sentences: At an early age, she gained success in competitive curling and was only 19 years old when she won the first of her 16 Nova Scotia curling titles. That led to competing in the Canadian championships, where she finished second.