Hello!

I've made a simple model in Blender 2.6

I wanted to export it as a nif model, but that wasn't possible unless I used an older version.
Someone said that you might be able to export it as a 3DS file instead and open it up with NifSkope.

But I honestly don't know what I am doing in that department. Could anyone help out? Much appreciated.

From Blender to Skyrim:
http://tesalliance.org/forums/index.php?/tutorials/article/109-3d-craftworks-from-blender-to-skyrim/

or with Nifskope:
http://tesalliance.org/forums/index.php?/tutorials/article/93-3d-craftworks-importing-weapons-into-skyrim/
(works not only with weapons)

Exporting nifs for Skyrim currently isn't possible. You must use one of the methods Tamira posted.

Alright, will try it out. Thanks!