Lasagne is a lot less time consuming/daunting if you already have the ragu in the freezer.
You can also do a base sauce for a curry that then just needs simmering with meat/veg. I saw the recipe linked below recommended on here a few days ago, I haven't tried it yet, but it looks good.
spicediary.com/2020/04/punjabi-murgh-masala-spiceclubstaples/
You can also batch cook without freezing and use up what you've cooked over 2/3 days, eg roast on Sunday, then leftover meat into a curry, pasta bake, meat and chips, meat in wraps with salad etc on the second day, followed by a soup on the third day if there's some left.
If you make chilli on day 1, you can do leftovers as enchiladas a day or two later, so it's a bit different but much quicker/easier second time round.
A midweek staple for us are the stir fry kits you get in the supermarket, I like the M&S one best but other supermarkets do them, you get a protein, noodles, stir fry veg and a sauce for about £6/7 and are good for 2 adults, you could probably stretch to a small child as well, not sure about 2, maybe you'd have to add an extra chicken breast. I don't actually like the sauce sachets included so generally use my own garlic and ginger (frozen in cubes from the Asian section in the supermarket freezer), soy, chilli etc. You could buy the things separately, but I find that once you've paid for the meat and veg, the noodles and sauce are more or less free, so it would probably cost more if not using the offer.
Obviously you are duty bound to feed your DC, but for fussy DHs, I'd take a 'like it or lump it' approach tbh. If he doesn't want what you have the time and energy to cook, he knows where the kitchen is.
You could also try Gousto (google for offer codes). It's not cheap at full price, but it might help build your confidence and then you might find it's worth buying a few storecupboard ingredients.
Or even Mob Kitchen. It's aimed at students, but the premise will suit most novice cooks. Each recipe is supposed to be easily accessible in terms of you could probably get all the ingredients in the Co-op, and doesn't take too long to cook.
www.mob.co.uk/recipes