One thing I've learned about 3D is that it takes time, I only know of a handful of people who picked it up right away. The rest of us took much longer, years in my case, to produce anything decent.
But it sounds like you're pretty busy with this comic project in your spare time. Still, your ship (I'm assuming that's what it is) isn't a bad start. With some tweaking, it could be where you want it.
