I sometimes draw as well (I am not good at it).
I use PaintDotNet (a free program), it can help to draw straight lines, and you can use gradients, and work with layers, granting you not too much complexity but still some nice flexibility =D
Love the name and the design Not sure about Chrome Canvas? GIMP & Paint Tool Sai are both very good (FREE!) image editing programs for PC that will offer you more control over your lines, as well as layering, gradients and various presets & tools to mess around with. On mobile, SketchBook & MediBang are also quite good (if you have a stylus). That's what I would recommend