Hey Thatsabigdog,
Welcome aboard.
Regarding your art,
Good start, but he is a little flat, and there are some redundant colours going on.
Here is a little exercise I think might help:
Try picking 1 colour for each section, hair, skin, costume, and try to form out his shape using those without the use of outlines. Make sure they are readable and clear. atm his silhouette is kind of just a blob.
Once you are happy with the shape add one additional colour for each section, a highlight for the hair, a shadow for the costume. Don't be afraid of contrast. You won't need more then one shade per section at this size.
At the end add in your outline and see if and where it works.
Hopefully this will get you to think of form and colour a bit more, atm I feel like your trying to draw with the outline and colour it in.
Goodluck!