Paint has a bad thing in making the drawing comfortable. I would suggest using either GIMP or FireAlpaca, both are free. FireAlpaca probably the most, it's the closest to the common used Paint Tool SAI. And it has layer functions, which would make shading, colouring, and stuff easier :> GIMP would be a bit confusing I'll say.
I have tried GIMP, it was confusing as... well I can't swear here XD I shall try to look up FireAlpaca :0 it sounds very interesting :3 Than you for you help Rilliane :3 -gives cookie and goes of to draw-
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