She is a little annoying with the way she handles her incompetence. It's perfectly fine that she knows nothing with the way she was brought up and it's also fine that she doesn't want to trouble her husband with everything but she should've asked him to assign her teachers so she can learn things and truly rule with him. Does she expect knowledge to be served to her on a silver platter ? The way she handled things in this chapter with the merchant was awful. Her past lack of knowledge isn't her fault but every moment she spends being ignorant in the present is 100% her fault. Even if she doesn't know that her husband loves her a lot, she should know he would assign her tutors if she asks just so she can do her duty well so even if she doesn't think he'll do it out of love and respect, she should know he'll do it for the good of the territory. In her mind, currently it's either handle things badly or ask someone else. I hope that changes soon.
Again, just so no one hits me with the "she was abused and she wasn't taught things properly" I'm not saying she should be an overpowered genius. It's fine if she fails while making progress but she isn't. Getting a book from the library obviously didn't help so what now