What kinds of things do you like? Any DC, their ages and are they fussy? To be honest I think it works best to plan around what you like best as that will give you the motivation to stick with it, rather than going OTT on what's healthy - of course maybe try and make sure there's variety (e.g. pizza might not be the healthiest, fine once or twice in a week, maybe not 5 nights in a row) and make sure there's always at least one vegetable element and fruit for afters? Anything you make at home is likely to be cheaper and healthier than a ready meal or takeaway version so you're already winning!
To give an idea, this in a fairly standard sort of meal plan for us, we're a mixed meat eater and veggie household so we will tend to batch cook meals that can be either meat or veggie (e.g. chilli which can be made with beef mince or three bean chilli), freeze extra portions then the next time we have it we can make a batch of meat-y version and get the veggie portion out of the freezer so we can all have the same thing. Then next time we'll make a batch of veggie version and get the meat ones out of the freezer. If you all eat the same you might not need to do this but it can also work if you have allergies or fussiness to contend with, e.g. one of my DC didn't really like spice, the rest of the family love it, so e.g. when doing curries we'd often make a batch of mild korma style curry and he'd have that when the rest of us had our madras or rogan josh style extra-spicy ones!
Monday: Lamb Kofta/Halloumi Pittas, oven chips and roasted Mediterranean veg (peppers, onion, courgette, aubergine, tomatos - we often make up big trays of this at the start of week, it keeps well in the fridge so can be reused through the week, including for lunches, is very nice with some hummus and bread or stirred through couscous with a blob of yoghurt or in an omelette. You can also buy the same veg pre-prepared and frozen in the supermarket so even easier).
Tuesday: Fishcakes/Veggie bubble and squeak with leftover Mediterranean veg.
Wednesday: Chilli with rice and green veg
Thursday: Curry with naan breads and carrot salad
Friday: pizza night, might buy ready made from supermarket or if we have the energy will buy ready done bases and top with our own toppings, with salad and garlic bread.
Saturday: home made burgers (veggie/meat) done on the BBQ, buns, bread, salad, chips
Sunday: roast dinner (leftovers will go into a shepherds pie or pilaf or stir fry or similar next week)