Ok, you got the right attitude about learning.
People here really are amazing.
Swordfish: Indeed, you are correct about the color. Might I suggest a base color of RGB(198,47,29)? Also, the front can use some work, for as of right now, it seems twisted instead of sharp and pointy. I suggest you take out the, err, diagonal metal glares(?). Overall, this ship seems to need a darker palette. The shadow in front of the cockpit can be prolonged and smoothed out with more shades. The, uh, rocket(?) in the back seems to have some sort of alternate light source, and it'd probably be good to keep light shading consistent.
You also need a rocket "hole"(?).
Skull: Texture is nice. Only thing I can find is to bring out the lower jaw a bit.