>>1973235>>1973237Draw shapes in an order from what appears to be on top to bottom. Every new shape can then be tucked under with "send to back" option. Doing this means that your shapes will never have gaps between them. Never try to line up shapes by eye or by trying to leave as little room as possible.
You program should also have an option to snap the edge of shapes and the screen. Doing this means that shapes meet a solid edge instead of hovering. You should pick images that don't meet each edge, but where they do it should be flat.
If you can't do fingers and complex hair you should work on way simpler images until you get a solid hold of the pen tool and tracing. My first image was half a face on the bottom of the screen with no body, and only two shapes.
While working you should have your source image in a separate layer under your vector, and should be able to see at all times how close your work is lining up. Every few shapes flicker visibility of the two layers to see what your image looks like alone, or what it looks like compared to the original. Look at your work as a whole during and after you are working on it.
Things like hair overlapping areas it shouldn't and miss-colors should really stand out if you LOOK at the drawing.