Learn to cook. There are all kinds of recipes and cooking sites on the Internet. If you prefer learning in a live settng, there are non-credit classes taught through community colleges. There are also meal subscription services like Blue Apron that will send you all the ingredients you need for a meal plus the recipe, although those tend to be a bit pricey. Still, they're a way to learn to make meals with minimal effort on your part, so they might be a good starting point for you.
It's actually kind of fun to cook and to try out new recipes. If you live alone and find that most recipes make portions too large for your needs, concentrate on finding recipes that freeze well. Freezing is great because you can spend one or two days a month cooking, and then reheat meals for the rest of the month. Lots of good meals for very little effort.