When I trace something I normally printout the picture and put it on top of a light box then tape it to the corners so it's secured in place. After I have done that I place a blank piece of paper above it and start tracing. Use pencil first though!
I would print out or just trace it on a window. Using the light can help you see the lines easier and makes the tracing simple and easy!
~Hope this helps!
~Izzy <3
