Bertia: Gets upset that she can't push the progress of this world ahead because she doesn't know how everything in her previous life worked.
Also Bertia: Knows enough about growing rice and making alcohol to create sake.
what?
It was refreshing when she admitted she lacked the knowledge to reshape the world based on modern ideas because that's such a common isekai type trope that I get sick of it. But that gets abandoned right away because we need to make sure that this feudal European-style fantasy setting learns about the true superiority of sake and other iconic Japanese items/customs.