[1] Océane Michelon gained her first international experience at the 2020 Youth World Championships in Lenzerheide, where she won bronze in the sprint behind Linda Zingerle and Liubov Kalinina.

[2] After another participation in the Youth World Championships the following year, the French athlete made her debut in the IBU Cup in January 2022 in Osrblie, achieving her first top-10 result in the individual event.

She also participated in the European Championships at Arber, narrowly missing a medal in the mixed relay by just over ten seconds.

Michelon won two more medals at the Junior World Championships: first in the individual event behind Lisa Maria Spark, and shortly after with the women's relay behind Italy and Germany.

The European Championships yielded no notable results, and her highest achievement in the IBU Cup was 18th place.