Learn to grow some of my own food

I want to learn to grow, harvest, and preserve some of my own food.

Supermarket food is expensive, and if I can be somewhat self-sufficient, why shouldn't I be? What will happen if I suddenly have very little money for some reason? At least this way, I'd be able to feed myself. Besides... if I grow it, I know where it came from, and what was put into it. If I don't want pesticides in my diet, I can be the one to choose not to use them.