Not bad bullet. I think you might improve it quite a bit by adding a slight curvature to the pieces around his head, not quite as dramatic as what I have marked in red but if you look at the reference, you'll notice they aren't quite flat. And then if you can bevel the edges (round them out a little more) so they don't look so sharp thay would help even more. Overall though, I think you're doing good. Just make sure you give your February challenge entry priority. I think your ship is pretty cool and besides, there's no deadliine for this wip .
Don't be satisfied with what you can do but rather strive to do the things you can't do!
Exceed Expectations!