(Not made by me but by, iamnotcharIie) but look at the wall details on there you should do something like that as it would make it a bit more appealing to look at.
I haven’t seen someone build in this old style in a long time and I’m personally not a fan of it for obvious reasons but it is slightly nostalgic. I would recommend adding lanterns on the walls of the first floor and maybe a sign above the door to indicate what it is because it looks more like a tavern than a castle. There doesn’t seem to be much space to add any more “details” on the exterior of the first floor as it’s mostly covered by the windows. The details @Kjeldino07 mentioned is better suitable for mid- & high- poly, which this build is not, so there’s not much recommendations.