I'm shocked that the largest complaint is the art. Although it does lack the polish that a published work would have, the actual drawings are done well in my own opinion. The characters are aesthetically pleasing and the expressions seem to fit the situation at hand. The backgrounds and environments are not the best, but this seems to be a one man, low-to-no editing work, so I wouldn't expect much more.
On the other hand the writing is rushed, jumbled, and overall jarring. I would put the art quality high above the writing quality. A confusing plot has been established with a very barren and quick exposition. I'm pretty sure the MC's name was not even mentioned, as well as having barely any other information about her or the setting. The main premise of the story was forced upon us so immediately that we were given almost no reason to care about it in the first place.
That being said, as others have mentioned the only way to get better at this kind of thing is to do it and it seems like this has potential. I'm hoping that the author learns along the way :)