Airship Sirius

It's an imaginary airship, of course, it could be the main character in a story set in late nineteenth century, I don't know if I will have enough time for that.
The model is probably not definitive yet, and the name is temporary, too. Also, lighting is rather basic in these renderings.

On the traditional side, besides doing some works I can't show on this blog, I'm struggling quite a bit with colors. I'm trying to find a way to "color my drawings". Basically I want to draw, but it would be nice to integrate lines with some color. Watercolor, inks and gouache are the best candidates, but I still have to find my way.