I'm sorry you're in the situation you're in. You deserve better. I hope you're finding good options from others, here's my submission:
Vegetarian/vegan option: A bowl of rice with black beans on top. A healthy spoonful or two of sofrito. Some diced jalapenos (I like to briefly cook them in a pan with a little oil, but maybe don't do that if you don't know what you're getting into).
Toast a few corn tortillas (I use the oil from the jalapenos, gives the tortillas extra spice). You can toast them as short or as long as you want, I like it when they have a slight crisp but are still foldable.
Use the tortillas to scoop up the food in the bowl. It's really best if you skip a spoon and just use the tortillas/your hands. Trust me on this, it adds to the experience. Plus you can't use your phone or anything because you're using your hands to eat, and it's best to focus on your food while eating instead of a device.
I prepare the rice ahead of time, but you could also just microwave a thing of minute rice. Canned black beans because I don't have the mental energy for dried beans. A rice cooker makes cooking rice so easy I never buy minute rice, but that also would be an expense you might not be able to spare. Honestly depending on how tight money is, if you buy your rice and beans dry you'll save a bunch of money.
I ate that every day for about two years due to a medication making to hard to stomach a lot of foods. Never got old, still regularly make it because it's easy, filling, and healthy.
Another option: fried rice. Bag of frozen veggies, rice, egg, you can throw in other random stuff. MSG is cheap and takes it to the next level. I'm a goblin, so I'll go to the Asian market and just try different savory sauces. Maybe don't do that.