Originally, it had a total of 111 chapters. If you don't have any problem with reading age gaps, you can give it a go.
As for the story, It was sometimes predictable, and sometimes the plot setting was too good to predict. The plot setting and art were really good. After season 2, art improved a lot (or at least I found it lovable). I didn't find it problematic; all the plots interested me. I wish they had a spin-off story with their daughter, as that one had a good plot too. If I want to add what I didn't like, that would be FL's lack of background story and how the future king and his fiancé behave with FL while staying in the palace arc.