It's alright, but it can do with some improvement.
I firstly noticed that most of the windows or holes in the walls are pretty squarish - you can make them more interesting by turning them into different shapes, like using stone brick stairs to give it a more circular shape
I also think you can texture the stone ceiling and walls with a bit more variety; the cracked stone running along the bottom borders of the wall isn't my cup of tea
Having the sea lanterns all clumped up on the ceiling and along the glass isn't that appealing to me either; maybe try using lanterns or texture the lights to make them look like torches, it'll match the castle theme more i think.
There's a lot of red banners too, it's kinda overwhelming to see so many of the same banners in every room; try and use a variety of coloured banners or other blocks.
I like the white borders on the floor, it contrasts well with the grey wool.
The fences bordering the water and bridges are pretty plain, try to customise your own walls and bridge borders, it'll definitely make it more unique.
I also noticed that there's water along the walls outside; definitely replace that with something else.
Overall there's a lot of things you can improve, but these are just my opinions. Definitely keep working on this map, it'll get better overtime, and don't feel disheartened by this critique either
I'll tag some builders for you so they can give you some feedback too
@AllyMac_ @KhrizKGM @_TrenzK_ @lucas1901
It looks great, I’m sure the builders can give you feedback! 
