If you are that afraid of cooking, start small.
Take something you know you like, and that you can cook, (it can be anything, even mac and cheese from a box) and play with it. You mentioned being a picky eater, but if you can list 3 or vegetables you like, a couple of meats, and maybe a few spices, herbs or flavoring ingredients (like onion or garlic) you can make hundreds of different dishes.
For example, you mentioned fixing pasta, with butter and cheese… Ok, that’s a great starting point, you take that in a lot of directions with minimal investment. Step one. pick a vegetable you like, pretty much anything will work really (although if you choose something like eggplant you will need an extra prep step). Stop at the grocery store on your way home from work, and purchase a small amount (just a serving) of said vegetable. This should cost you less than 1-2 dollars, even in the most expensive markets, there will be none left to go bad in the fridge, because you’re cooking it tonight, and if things go really wrong, you are wasting very little. If said vegetable is hard or very crunchy in it’s natural state, steam it a bit… stovetop steamer is fine… if you don’t have access to one, cut up your vegetable, put it in a microwave safe container with a lid, add a little water, and microwave it for a minute or two… If you smell the vegetable when you open the microwave it’s done. Prepare your pasta, add butter, cheese, and the vegetable. (maybe a little pepper/salt) and eat. Look, dinner. no recipe. Next time you’re in the mood to cook, pick a different vegetable, or add a spice. What happens if you add a little cream, or wine? Or meat (buy a small already roasted chicken from the grocery store, or Boston Market etc) and just cut up the meat and add it to your pasts dish. Try the same techniques with potatoes, rice, beans etc. This way, your main investments are in inexpensive, shelf stable “base foods” you can keep in your cupboard long term. This should help limit your fears about spoilage, and expense, and free you up to be a bit creative.
Don’t be afraid to start small. What I described above may not sound like cooking, but it is. And a few successes with basic dishes like this will raise your confidence enough to move on to using cook books to get ideas about different combinantions, or new cooking techniques.
As a fairly picky eater myself, I find it helpful to have a non-picky friend or family member as back up. If I’m trying a new food, I will cook only a small amount to try. If it turns out that I don’t like it, I will donate the remainder to a non-picky friend. I know it will get eaten, not wasted so I don’t feel guilty.
Good luck