Art is really good and story seems interesting for now. I'm not much for low confidence MC but hopefully the Emperor will be fixing her up in no time. Even if he's not interested in her romantically, he seemed like a smart guy and already showed interested in her career and understand that her ability would just be wasted if she keep her self doubt.
On the other hand, let's see how they handle the temporary emperor act since the prologue already said that he was the emperor who revived the country
Edit: Oh, that writer also did Okobore Hime! While they're not my favorite, it was still a pretty good novel, so I hope this one would be just as good