Dinners for lunch was a bad idea for me…. It was too much food/too heavy, as my dinners tended to be my higher calorie more complex foods. My weight went up.
Maybe it works for you though, and it makes things easy.

I encourage you to try to get into a routine.

A standard, reasonably healthy breakfast you eat most days.

A simple but delicious small group of lunches you can easily pack every day and rotate. Maybe mix in a take out/lunch out once a week, or dinner left overs once a week if you need to breaks, or even a frozen Annie’s meal you can microwave.

I love a grazing lunch. I just throw into a container: Cheese, hardboiled egg (make a bunch on the weekend in my egg cooker), cherry tomatoes, carrots, nuts, edemame, fresh berries, whatever easy finger foods I want/have at home…

Then slowly gather your list of easy dinner meals to make.

Costco rotisserie chicken – buy once every 2 weeks. Eat some for dinner that night. Then make other things for it that you can have for lunch/dinner other nights. For example, an easy stew or chicken chili or soup, chicken quesadillas, curried chicken salad etc…

Mix in other reasonably healthy proteins – salmon, tofu, eggs etc.. Just cooking a piece of fish simply is fast, healthy, easy once you figure it out for your stove/oven. I find a favorite marinade. Add 2 vegetables for sides. One starchy (eg. sweet potatoes, beets etc..) or tomatoes and one greener (steamed/cooked spinach/kale etc… or a salad).

Making scrambled eggs as your dinner protein is so fast and cheap.
So many ways to make eggs.

You should start getting used to eating leftovers or the same thing twice.
Come on.

Many foods keep well, and sometimes taste BETTER on reheating.
Also, you can cook in bulk, freeze individual portions, and then thaw 1-2 weeks later and have a fast easy meal, if eating the same week is too much for you.