Need help drawing in MS Paint? Here are some guides:
Grape_Candy
Vewoxi
Sammy's suggestions saving on paint:
~For a better quality, save on .png!
~.gif "distorts the image by changing some colors and pixel-ating the image even more than it already is" (~Lunar_Grape)
~.jpg blurs the image and makes it even worse than .gif
The rest of the "how do I" are on the guides.