[4] Fighting at light flyweight, she won a gold medal at the 2017 European Junior Boxing Championships in Sofia, Bulgaria, defeating England's Simran Kaur in the final.

[5][6] Moorehouse claimed gold at the 2018 European Youth Boxing Championships beating Russia's Kseniia Beschastnova on a 4–1 split decision to top the podium in Roseto degli Abruzzi, Italy.

[9][10] In November 2019, Moorehouse won her first Irish national elite title, beating Shannon Sweeney by unanimous decision in the final.

[11] Moving up a weight division to flyweight for her first major senior international competition, she lost in the quarter-finals at the 2023 European Games in Poland, going down via split decision to France's Wassila Lkhadiri.

[17][18] She was given a bye into the second round[19] where she controversially lost to 2023 European Games silver medalist Wassila Lkhadiri from France by 4:1 split decision.