Experiment. Learn what spices go the best with different foods. Rice can be made a thousand different, tasty ways, anything from rice and beans, dirty rice, to rice pudding. It goes well with any meat or veggie. Pasta is also great as it can be served many ways. It can be done with a tomato sauce, cream sauce, or simply served tossed with olive oil, garlic, pepper, and a little melted butter, and add any meat or veggies that you like.
Buy pizza crust mix or learn to make your own. Top it with anything you want. You can make a chicken and broccoli pizza, an exotic veggie and cheese pizza, a chicken, feta cheese, and greek olive pizza, or just a regular old pepperoni pizza. The possibilities are endless, and since there are so many toppings to choose from, you will never get tired of having to eat the same old thing.
Try not to use canned veggies if you can avoid it. You will feel more full with fresh veggies and they will be better for you, and the difference in taste is enormous!
One of the most simple things is to put chicken breasts, thighs, etc. into a pan, and throw a can of cream of mushroom soup on top and bake at 350 until done. Very simple, but very good, and you can substitute the chicken for pork chops if you want. When done, put it on a bed of rice, or serve with a veggie of your choice.
My first cook book was the very simple yet great "The joy of cooking". I learned how to use the proper heat to cook things, etc. Never cook food on High! At the most, use medium/medium high heat. Your food and your stomach will thank you. Food will be more moist and succulent. Too many people rush while cooking and use too much heat.
If you are being frugal, ask the meat person and the produce person if there are any mark downs for the day. Most times they will accommodate you and find great stuff for you and mark it down. The supermarkets I go to, I always make it a point to ask the meat guy or produce person if there is anything getting ready to be reduced. If it's not busy, they ask me what I want, chicken, pork, beef, etc. You would not believe how many times I get day old but still fresh Boneless Chicken Breast for .99/pound, or 93% fat free ground beef or sirloin for $1.99 per pound. The same for veggies. It is not rare to get a bag of 6-8 nice green peppers for .99 cents, etc. Swallow your pride and ask nicely, and you will eat like a King-or Queen-lol.
If you flat out can't even boil water, invite a friend over who does know how to cook, and make dinner together. It will be a good chance to learn to cook while entertaining a friend.
If all else fails, save up and go to a cooking school. There are some that are very inexpensive to go to. You will have fun, and you will also meet new people.
I started cooking when I was 12-13. By the time I was in High School, I would win awards for cake decorating, cooking, etc. It used to drive my mother crazy. I even got slapped in the face when I brought my cake decorating award home-lol. She yelled "Why couldn't it have been for football or something like that" LOL
Just have fun, BE CREATIVE, and take your time.
Good luck!!!