Instead of drawing in Gimp/Photoshop, etc.
I used a couple of websites quickly and they seem really good at
either pen control or line smoothing/tapering.
If you don't have good software (Gimp is a good free software you can use though)
then try a one of these websites:
(They seem safe and stuff but whatever)
http://artpad.art.com/artpad/painter/Quickly drew:
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https://sketch.io/sketchpad/
Quickly drew FF fan game concept art:
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"Sometimes you gotta run before you can walk." - Tony Stark, Iron Man.

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