Very much a fan of the icon you made *Destero. May I recommend that the boat at the top of it be made with more contrast? Remember that this image will usually be shrunken to work as a watermark on shots from the project.
Everyone else is trying to be neutral on what province you can join. I'm here to advertise for Iliac Bay! We're in the process of spooling up an interiors department and would love to be able to get you making dungeons in our prerelease areas!
That's the LOD mesh for the worldspace. You'll need to regenerate it. https://www.darkcreations.org/hoddminir/generating-lods-for-your-worldspace If you're only looking to get rid of the stuff in the way for now instead of proper terrain textures/etc., you can skip ahead to "Continue to generate the landscape LODs with Oscape".
I'll get the thread going as soon as I can; busy week. Any particular interiors tileset you prefer? It'll be pretty freeform. You build a dungeon or whatever you like, and I'll help out with fine-tuning and details. If you haven't, I highly recommend the Creation Kit Wiki's introduction tutorial.