Ahsoka and Barriss discuss how they, as well as the Jedi overall, won't know what to do with themselves after the war. Not only has the Jedi order existed for thousands of years, most of which went without large-scale conflict, but the Clone Wars have only been going on for less than a year at this point in the timeline. Ahsoka and Barriss both began their training a decade or so prior to the war's inception, meaning they spent far more time as Jedi trainees outside of war than in it. The war is the aberration to their overall experience, not peace.