I love this piece, although this is a great piece there are a few things that need fixing upon
First off, the lighting when transferring as Nesoi said is very dark, you can fix this in photo
shop or by just turning the light on (I suggest investing in a scanner just personal preff.).
Also before drawing over the sketch with Ps or whate ever program you use put the base
sketch that you put on paper as the back round and create a new layer before
drawing with the paint brush or brush used in the program used. Also the lines
are not smooth and go back on eachother alot try fixing that by drawing lighter
at first and when outlining go dark (personal preff.)