Not only did I add the boxes, but I dug 2 feet down and broke up all soil to remove as many grass and weed roots as possible, and to aerate the soil.
I also added 20 bags of rich gardening soil and gardening compost to rejuvenate he land.
It's finally done.
Not too shabby for a city kid from Mexico. It sure helped to have had little gardening projects during my summers as a kid in Sweden.