Unless you are trying to dream your own shit up, cooking isn't difficult at all, as long as you can read directions. Usually the hardest part is making sure you have all the ingredients (which I never did), and then going to the store and getting the missing stuff.
Go to one of the online recipe sites, like AllRecipies.com
, and fine a few recipes for what you want to cook. Take a look at all of them, and decide which one you want to follow. There is a little 'voodoo' in this, because if you haven't made it, you don't know if the recipe is good. The obvious alternative to this is to get a recipe from someone else.... Since very few of my friends cook, I usually just experiment (and I have had good luck picking recipes at random).
Once you have the recipe, unless it calls for extreme measures, it is a matter of cutting and preparing your ingredients, placing them all in/on the heating device, and waiting the proper amount of time. About 3/4ths of the way through the expected time, double check on it to make sure it isn't burning/slow.
If you want to get all fancy, you can try and work on your presentation and dish, otherwise you can slap it onto a plate. I practiced cooking tons this past summer (yes, even CS majors can cook)... If you need any advice, give a yell...