Agree with everyone's comments so far. Really nice work to have just started out. I particularly like the job you've done on the reds and the patina on the metals.
Now that your metals are darkened up though, go back and spot a few highlights on them and it will really make the whole thing start to pop. Also, you're going to have to bite the bullet and work on eyes. I think this model could look really great with just some work on his face and eyes (the focal point of the model), and a decent base. The thing to remember when doing anything really small (like eyes or rivets) is to paint from the outside in. If you want a dark ring around the eye, paint it black or scorched brown (or whatever GW's darkest brown is called now) first, then do the white leaving a little ring of the dark color, then do the pupil last. There should be some good tutorials in the article section to help explain what I mean. But I'd certainly practice a bit before throwing any paint on your nearly finished model.
Again though, welcome, and nice job.
