People hear "grow your own food" and picture rows of crops, a tractor, a whole operation. That's not what this is.
Five gallon buckets, a bag of soil, and a sunny spot against a wall will grow tomatoes, peppers, lettuce, and herbs without a yard at all. Drill a few holes in the bottom for drainage, and you've got a container that costs less than a week of store-bought produce and keeps producing for months.
Herbs are the easiest place to start. Basil, mint, green onions — most of them will regrow from cuttings you'd otherwise throw in the trash. Cut the root end off a green onion, drop it in a glass of water on the windowsill, and in a week you've got new growth to cut again.
Lettuce is nearly as forgiving. It doesn't need deep soil, doesn't need blazing sun all day, and you can cut just the outer leaves and let the plant keep growing instead of pulling the whole thing.
The point isn't self-sufficiency overnight. It's cutting the grocery bill down one ingredient at a time, and realizing most of what stops people from starting is the idea that it has to be bigger and harder than it actually is.
Start with one bucket. See what happens.