This shows potential, but there's a lot you can do to improve this model:
Work towards a gradient between highlight and shadow; this is key.
Seek to define areas of the model using contrasting colors and neatly painted edges, perhaps even a brightly co,ored trim.
It also would help to work on the lighting in your photos. Try to get the whole model well illuminated, as this shot has some very dark spots in it.
Keep up the good owork!