I don't know how much you can cope with cooking due to disabilities but I can give suggestions so I hope I don't offend you. You are making great lifestyle choices so I hope you are beginning to feel better about yourself. You deserve it because you are helping yourself and doing all the right things. Although I am having more bad days than good ones I know I need to be supportive as it helps me in return.
Last year I got one of my best buys ever which is an air fryer, food tastes so much better because it doesn't need oil it. If you make your own chips a tablespoon of oil needs to be put in but it doesn't make the chips greasy. I like using it for Rick because he is a fussy eater and often give him baked beans which is allowed on his diet. I am finding I'm eating more cold food such as fresh cooked meat, potatoes, veg, salad and fruit. It can be hard work but it's worth it to improve our diets.
Eating pasta and rice is good with veg, sultanas, raisins, strips of meat such as chicken. It sounds expensive but it isn't as I had to learn to get food on a budget. Like you I cook for two people so it isn't unusual for me to cook a double portion such as bolognese or chili then freeze half for another day.
I also put money in a savings account as well as it's a way to safe for holidays, Christmas, special occasions etc. Last year I also saved money at home so Rick was surprised how much money we had so we didn't have to touch the savings account.