Most supermarkets sell whole roasted chickens, of various flavorings. They’re relatively cheap compared to eating out (still cheaper to roast one yourself), and usually pretty good. One will easily feed two, plus leftovers. Serve with easy vegetable (frozen corn/peas/beans/whatever) and/or simple carbs.
Strip the meat off the carcass, and make chicken salad with the leftovers. I usually go with halved grapes, diced celery, and whatever herbs I have at hand (tarragon or parsley), plus mayo or mayo + greek yogurt, salt & pepper. Maybe some lemon juice or minced peel, too. If you don’t have enough meat left over, buy two chickens at a time. Chicken salad will last a week in the fridge; eat on bread as a sandwich, or with lettuce as a salad.
I also keep tuna salad in the fridge: 2 cans chunk light tuna, diced midget pickles or pickle relish, minced dill, salt + pepper. Again, eat on bread or with lettuce.
Crock pots are awesome; ask for one as a holiday gift. Then, at least once a week, make soup, pot roast, pasta sauce, etc. Freeze any leftovers (if making soup, don’t freeze with potatoes). And there will be leftovers.
If you have a crockpot and bought a roasted chicken, toss the carcass in with a couple onions, carrots, and celery all roughly chopped, cover with water, cook on high 8+ hours. Strain and discard the solids, chill in fridge overnight, skim off fat on surface, and use as delicious (and cheap) chicken stock for more soups.
Having chicken or tuna salad in the fridge and soups/meals frozen saves me from “eh, too much effort to make something; I’ll go get takeout.” It’s way cheaper. And, while you can live on takeout while you’re a bachelor mostly low-maintenance male student, those eating habits will overinflate your waistline in a few years. Better to break the habit now.
Note: if you’re not wild about chopping herbs or celery or whatever, some supermarkets have it available precut in the produce department. It’s expensive when compared to doing it yourself, but still way cheaper than eating out. Likewise, there’s prepared herbs-in-oil or paste that’re okay; look in the “organic” produce section, usually. Use dried herbs only as a last resort (they taste like dust).