Not really "design," but modeling - Taranis69
has a 2-part tutorial on modeling Enterprise
(NCC-1701) in Lightwave, and the info and techniques could be applied to your own designs, easily.
- Setting up your blueprints and workspace
- Modeling the bridge and 'teardrop'
I'm sure he will continue with the rest of the ship, but these things take time, as we all know