Raised beds are awesome, and easy to maintain once set up. I can suggest the Square Foot Gardening method, to at least get an idea on how to manage a raised bed system easier. I borrowed from that system in setting up mine.
Two feet wide is maximum, and err a bit narrower if your bed can only be reached from one side (these are wonderful to put around your perimeter if you have to fence it as well, especially privacy fencing. It gives you productivity for a usually wasted space along the fence, and putting lattice for trellis against fence is peasyeasy). Two sided, three feet wide is great.
I do have an RGGS (rain gutter grow system) set up as well. The big thing about this is that I can nest the growpails (5 gallon pails) inside another pail with a side cut access hole so my peppers can become houseplants during the winter as an easily maintained self-waterer. That way I can keep a pepper plant for 4-5 years and in production-with enough light and doing the q-tip bee routine I can get pepper crops in the house.
Back to the raised beds. Keyhole gardens are a circular raised bed with the center and an access path built in as walkable. You can reach everything easily and they are an efficient way to use your space. I have a hybrid, done in a 6' stock tank with a rusted out bottom. Outer ring is green bell pepper plants, then there is a ring of cherry/salad tomato plants and a couple of pavers for me to step up and into the middle of the tomato plants. I can reach all but the very center from the ground and once every few weeks go 'up top' to pick the few weeds I see from there and convince the caged tomatoes to stay caged...
Raised beds you can build one at a time so they are not so overwhelming to get going. Pave, put down landscape fabric, or otherwise do weed control between. You can grow grass but make it mower wide between your beds or you will find it impossible to keep the grass managed.
https://permies.com/t/12429/Interesting-keyhole-hugelkultur-design
https://permies.com/t/68883/permaculture-projects/keyhole-garden-summer-drought
https://permies.com/t/65648/Raised-bed-garden-fallen-tree
Just to get you started. There are many articles here about building raised bed gardens.
If you make long parallel row beds, break for crosswalk every so often. More than 16 feet to walk around gets tiring, I find a walk through break about every ten feet is nice.
If you visit me you will see not every weed is gone, especially bushy type ones. I use one fresh picked to wave ahead of me between things to remove the working spiders and their walk-in webs between me and where I want to go. When I finish, the weed brush gets tossed in
compost. I used to be a legendary arachnophobic, living here has taught me otherwise. Still I abhor walking into a web so this just makes life happier. I don't kill the working spiders keeping my insect levels down and I don't hit their webs. I also learned to identify most common spiders on sight as we do have three of the nasty ones here; and what the nasty one's webbing patterns are. So I can figure out if it has to die or not as I go. Orb spiders can get huge and scary but they are a very good spider as a working spider. One big one next to my tomato plant patch though is a good deterrent to most. I can break her web and get her to go hide so I can get in there and pick the luscious tomatoes. I mention spiders as if you grow raised beds parallel you will have opportunists...