She moved to Indonesia at the age of two because of her father's business, and spent her youth in Singapore. You Young began skating after watching Yuna Kim's victory at the 2010 Winter Olympic Games. Though maintaining South Korean nationality, she was raised in Singapore and trained under various coaches and competed in the Singapore National Figure Skating Championships from 2011 to 2013. One of her coaches was Singapore-based Zhang Wei, a former Chinese national ice dancer who won gold with partner Wang Rui at the 1999 Asian Winter Games, who she trained with for a six-month period in 2012. Zhang said her talent was evident even then and told TODAY: "She's not the most talented athlete I've coached. But her jumps, explosive energy, flexibility and coordination were very good then, and it is very rare that you get all these qualities in one athlete, particularly at that age." He is confident that You has what it takes to become a future world and Olympic champion. On his advice, You returned to South Korea with her mother in March 2013 to further her development as the training environment is better. In January 2016, You Young won the gold medal at the 2016 South Korean Figure Skating Championships, becoming the youngest ever national champion of South Korea at age 11, surpassing the previous record set by Yuna Kim who won at age 12 in 2003. In March, You won the gold medal at novice level of the Cup of Tyrol. In November 2016, You won the silver medal at novice level of the Tallinn Trophy behind Alena Kanysheva of Russia. In January 2017, she finished fifth at the 2017 South Korean Figure Skating Championships mainly because of a fall in the short program. You debuted on the Junior Grand Prix (JGP) series in September 2018, placing fourth at JGP Croatia in Zagreb. In October, she placed fifth at JGP Italy in Egna. In January 2018, she won the gold medal at the 2018 South Korean Figure Skating Championships, earning her second national title. In March, You finished ninth at the 2018 World Junior Championships. In August 2018, You began competing on the JGP series, winning the bronze medal at JGP Slovakia in Bratislava, behind Russians Anna Shcherbakova and Anna Tarusina. It is currently her first and only JGP medal. She then placed fourth at JGP Canada in Richmond, British Columbia, Canada. After earning her third national title, You was assigned to the 2019 World Junior Championships. In February 2019, she won gold at the 2019 Bavarian Open and the 2019 Winter Children of Asia ISG.