Good luck OP 
Fresh pasta with pesto/stir in sauce/philly with salmon, peas, broccoli.
Chopped tomatoes, garlic, chilli, olives, anchovies - cook for 5/10 mins then mix with gnocci or pasta.
Defrosted tuna steaks pan fried for 5 mins, serve with chopped mango, coriander, chilli, soy sauce.
The best thing to do is maybe meal plan at the start of the week so you can do double of some things like mince etc and then mix with bolognese sauce one night, and cook with mixed beans & chilli sauce another. And if you do a salad just do a big one so you can have it over a couple of nights.
Have lots of frozen sides in, like garlic bread, flatbread, chopped veg/onions. Make things easier for yourself, there are loads of decent ready meals now (Aldi is good for these actually, pretty good ingredients) and have a stock of potatoes for baked spuds.
Ask for help and accept it when anyone offers!