The first thing to learn with domestic cooking is
mise en place. The logistics of having things prepared and doing things in easy stages. Keep things really simple and minimise that frantic rush to fill plates at the end. Roast chicken is a perfect example.
This
Marcella Hazan’s roast chicken with lemon
Is reliable with a decent chicken. You don't have to be too fussy about sealing the bird, stab the lemons put them in the bird, salt liberally, and just tie it up and douse it in a some olive oil. Then put in a hot oven about two hours before serving.
Two cheap timers are better than one for this sort of thing. One for the chicken another for the potatoes.
A 3lb chicken takes about an hour and a quarter. A good gamey French bird needs a little longer.
Sometimes after 20 minutes I throw in some whole garlic cloves in the pan and flip the bird upright. I do baste it a couple of times after that more to check nothing is burning. When the times up take it out and let it rest for at 20-40 minutes. This takes all the pressure off and poultry like a lot of things is better warm than hot. You can deglaze the pan with wine if you fancy something a little of something gravyish but it's not really needed with roast potatoes.
On potatoes: you need a slightly floury variety as for chips. Unlike the chicken they should not be kept waiting around long before serving. They need about 50 minutes total in a hot oven so they go in before the chicken comes out.Peel, cut into angular chunks, salt and parboil for about 10 minutes. Knock them about in the pot a little. Take some of the tasty fat off the dish the chicken is roasting in and in a separate uncrowded dish flip them about in it. Turn after about 30 mins by which time they should be getting crusty. If you want to be fancy throw in some chopped rosemary five minutes before the end.
In summer a herby tomato salad goes well before or alongside. In winter probably a nice sweet frost burnt brassica tossed in a lot of butter.