Bruh, the art is good but the MC is giving me cancer. One thing is being a clutz or being useless, but being unable to even fucking clean properly? The logical answer in all this would be that she has an advanced sort of mental disorder that impairs her capacity of focusing on reality hence her inability of fucking cleaning windows and grounds.
As for her naivety Im kinda lost. A princess useless and dumb or not should have received a high quality education that should have chased away idiotic thoughts like the existence of a benign God that would favour a single person over millions of suffering bastards. The concept of the story is good but making a Mary fucking Sue the protagonist touches my nerves.