If this is your first attempt at making something like this, just give it some time. I'm planning on posting some pixel art Transformers on my page and if you want, you can take a look at them to get some ideas.
I guess you haven't looked at my gallery, cuz I've done over 200 of these. I just don't like the shape of the limbs on the Ingrams, mostly. The Gundam and Valkyrie ones I've done look much better. I mostly do human Lego anyway.