You need to start off by cooking something with versatility, like chicken. Once you get good at cooking chicken, then you can start adding other ingredients and making a number of different dishes, for example: chicken parmesan, roast chicken with olives, chicken curry, sauteed chicken w/ sweet potatoes, coconut chicken w/ rice, chicken marsala, stir fry chicken, and so on.
Of course, I don't know how to make any of that stuff. I suck at cooking.