Is there any good, easy to follow tutorials for converting custom Morrowind nif files to Skyrim format.

I've been working on a mod and had modeled a bit of architecture for it, now I am trying to convert the mod to Skyrim. any good tutorials that are easy to follow!?

Skyrim nifs are not really supported 100%, let alone be able to import them to a modeling program. Not to mention collision isnt decoded, so realistically, you are SOL unless you dont mind your models having no collision.

This. You could probably use NifSkope to copy your NiTriShapes to an existing Skyrim-format .Nif and go from there, but as far as collision is concerned I don't think there's much you can do. You could build custom collision box primitives for your mod using the CK I suppose.