You can do this 
There's a really easy, foolproof recipe for roasting a whole chicken.
Check what it says on the packet about the roasting time and temperature and set your oven to that temperature. Then take a roasting pan and put a fistful of salt at the centre of the pan so it makes a little mound (just plain table or sea salt, it doesn't matter).
Take the chicken out of the plastic and put it, breast down, on the salt mound, then press it down a little so it doesn't wobble too much.
You don't need oil or anything else, just the roasting pan, salt and chicken. Just remember to put it breast down in the roasting pan (the opposite way from how it comes in the packet).
Then put it in the preheated oven for the time it says on the packet. And that's it.
It comes out juicy and tender every time with loads of crispy skin, and not really salty at all.
You can serve it with frozen mash and veg and use the leftovers in sandwiches or, when you get a little more confident about cooking, in a curry or risotto.
I also found bell peppers are a vegetable kids tend to like as they're quite sweet tasting (red peppers for sure). They don't need peeling or cooking (although you can certainly cook them in lots of different ways).
You can just wash them and cut in strips. If there are any seeds on the strips, just take them off.
You can add them to sandwiches for an easy way to make them healthier, or with dips such as hummus, or in salads.
Sometimes when I don't feel like making lunch we just have lots of finger food, like vegetable strips (carrots, celery, peppers) with different dips (hummus, guacamole...), boiled eggs, cheese cubes or strips, with some toasted bread on the side and olive oil. Cheese goes well with grapes, or olives if you like them.