It looks pretty good considering this is your first intermediate post. All I suggest is not to use the blur tool for coloring, it's alright to smooth things out a bit, but is also easy to overdue. Try using more shades for light and dark/shadowing instead of the Burn and....whatever the other tool is. Also, you might want to try some layers so that you can color without the hazard of coloring over your lineart ^.^
drawn in 41 min