I had some time on my hands today, so I tried two different approaches, the first, playing with different settings on the tablet, I was able to control the lines a little better, now I think it is only a matter of practice. The second one, with pencil on paper, then a pen over it, so it is easier to photograph. 

Hey if you have any suggestions or would like to know more about the settings, the only way I can know it is if you comment, so go ahead.