I use a touchscreen laptop

OMG

i draw with mouse, and im pretty good if i say so myself, its hard but first of all you need to know the area you are drawing second of all you trace out a drawing, move it in a way your mouse can. keep it in the mouse pad or its gonna look weird. trace it out with the mouse, and have it in a motion where it copys the original thing you want to draw, and voila!

:D