I busted up a four foot by eight foot section of grass with a shovel, laid down some compost I had from several years of yard clippings. Then the grass went back on top, upside down.
In a week or so, phase two will start up. More layers to the raised bed: soil and mulch. Then I have a month or so of rest before the plants go in. It's like planning a D&D campaign.
Don't let anyone tell you need power tools for this sort of job. Just go get the power tools from the start and save your hands. I regret using hand tools for the whole project. Everything hurts.
But if it makes a nice backdrop for summer gaming in the backyard, it will be worth it. Last year, we spend a lot of time outside and 2021 is looking to be a rebuilding year. No family vacation this year.