The Count's Lands for a Portal Girl

I’m thirty-five, and I’m a transmigrator. With land and an estate, but without money or connections. All I have is my brain, my quick wits, and the school of life I learned on Earth. In this other world, I have to do a lot: protect the peasants from starvation, set the estate in order, and… No, I don’t need to get married. What? The groom isn’t asking my opinion? Well, that’s his mistake.