This game sort of has potential, but since the MC is both unable to be named, and a dwarf, not really my cup of tea.
I would suggest you ask the community for a translator because the english in the game is pretty much nonsense, literal translations are always bad and even worse when any language to english. Even english (britain) to english (united states) can be horrible. Take the word nappy, and it has so many meanings in both countries that are at once the same and mutually exclusive depending on context.
It's understandable that you want the brothers to be shorter for story purposes, but barring significant genetic abnormalities, males are taller than females of the same family group. To justify the extreme height difference, you are going to either have to put in that they both suffer from dwarfism, or that they are under the age of 12.
There is a massive potential grind already added in, so you should probably tag sandbox, or put it in planned tags before those who dislike/hate sandbox games come down on you for not warning them.
Good luck on your story, and I hope I was able to help you with my critique.