Another tip for HollyTheTeacher: pick a night or nights for easy dinners. Like on Mondays, have that be pasta night. Super easy, so fast. You can also bake spaghetti with cheese on top, which is almost as good as lasagna and easy on the cook. Or get a nice big bag of frozen ravioli, which is even faster than dry pasta.
You can buy the Hunt's marinara in tall tin cans (cheap), or the Paul Newman's or Muir Glen marinara in glass jars (organic). Eventually, you might even be able to can a year's worth of marinara on your own!
The point is, pasta is a two pot dinner that's fast, cheap and reasonably healthy.
Then pick a night that's pancakes and (veg?) sausage. If you want, mix canned pumpkin or mashed banana or canned/frzn blueberries into the pancakes. Use real maple syrup, or make your own pancake syrup to avoid HFCS. (So easy- 3 cups white sugar, 2 Tbs molasses, 1 tsp maple extract- or flavoring, same thing-, 2 tsps butter flavoring, 3 tsps vanilla. Whisk together, bring to a boil. Done.)
That's two nights a week that you barely have to cook, and it's cheap.
Until you work up to homemade food, you could also eat frozen pizza one night a week, or get those take and bake pizzas that they have at the grocery store.