Laidsalu played in two European Junior Curling Challenge events during her junior career in 2013 and 2014. In 2013, her team finished with a 3–2 record and in 2014, they made the playoffs before losing to Italy in the quarterfinals.
In 2015, the Estonian junior women's team qualified for the 2015 World Junior Curling Championships where Laidsalu played second on the team skipped by Marie Turmann. At the tournament, the team finished in eighth with a 2–7 record. Because of their bottom three finish, they were relegated to the 2016 World Junior B Curling Championships in order to earn their spot at the 2016 World Junior Curling Championships. At the B tournament, they just missed out on qualifying for the Worlds, losing the bronze medal qualifying game to Hungary.
While still in juniors, Laidsalu played lead on the Estonian mixed team that represented Estonia at the 2015 World Mixed Curling Championship. Her team of Martin Lill, Kristiine Lill and Siim Sildnik finished in seventeenth place at the tournament with a 4–4 record.