I suggest getting GIMP, I use it myself. There is A LOT you can do on there and I think people underestimate it.
Some things that paint does not have include multiple layers, smooth strokes, full brush customization, blending and blurring, image resize and rotate, etc.
It will allow you to do the same thing with much more flexibility and control. And also allow changes to things much easier.
As for being your first, I think you did really good. Definitely wolf with shoes.