(The things in the picture are chilaquiles, I don't tell you how to make them in this instructable but they taste great. Link to recipe, here, my aunt makes them :-D)
Step 1: What you need to know about cooking/baking
First, cooking is NOT an exact science. Despite what people may tell you, it is, for the most part, not. You're first step to cooking would be to know how to follow a recipe. Follow, follow, and follow recipes. The only way you will be able to learn to cook is by doing it over and over again. If you come across a term you don't know, Google it, there are dozens of people out there who want to tell you what those terms mean.