My recommendation would be a Smith and Hawken but they are out of business. A good long handle garden fork with a solid forged head is an absolute necessity. I prepped my garden before Christmas and like you, I made 4’ beds with 2’ walkways. I went up to town and got some shredded wood from Public Works and put a 4" layer in the paths. A truck and trailer are also indispensable for gardening (vehicle reference here).
Earlier last summer, I got a trailer load (about 1.2 yards) of horse manure for each bed (22’ long) and let it age over the summer, then turned it under with my fork. I didn’t really turn it so much as just disturb the soil down the depth of the fork to let the manure sink in. I did till the beds before getting the manure so that when it rained, the water would carry the “manure tea” into the soil below the beds and not run off.
After getting the manure forked in and the wood chips spread, I went back to PW and got several trailer loads of old shredded leaves and spread them over the beds and finally covered them with a thin layer of old wheat straw.
Today I planted the blackberry that arrived today, tomorrow it will be the asparagus and strawberries. I have started artichokes, tomatoes and milkweed in flats for setting out later.
If you are going to make a new garden, you need to start by early fall for the next year, spring is too late.
I have three tillers. one is an old Troy Horse with a 7 hp Kolher engine, one is a 5 hp Troy Pony (original Pony, bought new, mail order back in the 80’s) and the third is a Mantis. The only reason I didn’t use the Mantis this year is that I need a new one, I wore the old one out. Do not confuse the Mantis tiller with one of those mini cultivators, this sucker will shread the ground down about 8" in very short order.
Once you get the hang of it, it doesn’t wear you out either, but it does take a little bit to get used to it. You have to figure out just what the optimum pull works for you.