Yesterday I was in a hurry, so let me elaborate a little bit further.
What we call no-till gardening is a philosophy of not disturbing the soil life by any means. There are many variations, but essentially it is to not use a rototiller before planting every crop, not use heavy machinery over the planting area or even walk over it. The goal is to increase the microorganisms in soil, since they are required for healthy plants. You care for soil life and they shall care for your plants. How do you do that?
1. First you have to design where your beds and pathways will go, as you don't want to walk over your carefully prepared soil. A good bed is as big as possible, but which allows you to reach the center of the bed without stepping over. For most people that's 1.20cm wide (4 feet I think). You can make them thinner, but know that plants enjoy being surrounded by other different plants, the more the merrier, so having a big area plenty of different plants will give more chances of success if your goal is to forage your garden for your own consumption. As for pathways, a minimum width of 60cm (2 feet) is recommended if you are going to use a wheelbarrow. You can design it into rows, looking like a classic
permaculture farm, or you can design it into free forms, looking more like a food garden. A good design will consider waterflows, shading and wind, but since you are just starting, let's hope your zone is fine.
2. Then you need to create a proper medium in which life will thrive. Good earth, silty, not too sandy or clayey (if it is sandy, add in clay or more organic matter), filled with organic matter at least a 2%, more is better. No pollutants, not too many rocks, a pH close to 6.5. That's why you need to analyse your terrain and see how it can be mended. You can fix almost any earth as long as it is not too polluted. If your terrain is useless, you can still add good soil on top of it, or replace a section with healthy soil. The deeper your good soil is, the bigger roots your crops may develop. Minimum depth should be 30 cm (1 feet), but 60 is recommended (2 feet). I would recommend to dig to the desired depth and loose or replace the hard pan that is most likely located at this layer, at least for the first time. This layer is what prevents your plants from developing good roots (that's why a rototiller is used in industrial farming). With proper management, this hard pan will not form again, or if it does, you might loose the top layer with a pitchfork easily.
3. Next, you have to figure how to work with your climate. In some climates and soils you have to be very careful about drainage, that's a killer. In my climate it never rains that much that the terrain risks flooding. In some others, the challenge is to prevent drying out. A shade from a tree, especially a decidious one, is the best protection for humidity, although too much shade is not good for some crops (check how many sun hours per day they require). Also, mulching will offer some extra protection. About mulching, you can do it with living cover crops, cut and drop weeds/old crops, hay and even stones. A word of caution, stones exposed to hot sun might burn your plants. However, you don't need mulching if you plant an intensive bed: if you plant so many seedlings that you can't see the ground, you don't need mulch. In intensive growing, you have to 'clear' some plants as they grow and compete for the space. Wind and heat are also threats for the humidity, so depending on your case you might need some wind barriers (usually a tree screen) and protection from the evening sun. Heat and cold might ruin your plants too, so you either adapt to the growing season or try to offer protection (greenhouses, food forests, walls, vines, ...). The general idea is to keep your soil moist, not wet, and warmth, not hot or cold.
4. Finally, you have to inocculate microorganisms into your soil. There are already tons living in your laws and given good conditions they will thrive, but you can help them by adding some well made compost (slightly brown, not black), or even purchasing an industrial inocculant.
5. Select varieties that will work well with the conditions you are provinding. It's a good practice to grow your seeds in a seedbed, and transplant the seedlings when they show their true leaves (the first ones are like baby teeth, you will know that the seedling is still a baby). It is still better if you learn how to grow your plants in different weeks so you don't have to harvest everything on the same day. You are gardening, not farming.
And that's it. The rest is common gardening knowledge. Keep doing this and let Nature do the rest. Let me add some other warnings.
-About raised beds, I will caution. They are good in some climates, but not in others. Raised beds: Less weeds, better drainage, less cold damage, easier to work. Buried beds: Less watering, less heat damage. If uncertain, start by using a ground level bed, see how your crops fare and decide which kind of bed will benefit your plants more. (If they flooded, you will need a raised bed or to install a drainage system, for example)
-About weeds, you might use cardboards under your planting area and heavy mulch around them, but if you use intensive planting, you just cut the weeds and your plants will cover the space, preventing further weed growth. Or you can become a
permie and learn about benefitial/edible weeds and include them in your growing schedule. Lawn grass is pretty invasive, though, and might require extra effort.
-About organic matter, you will have to add it on a regular basis, since organic matter decays and dissapear into the atmosphere, so keep adding compost, manure and/or organic mulch every year. When harvesting, cut your plants by ground level (unless they are root crops), and let the roots rot in place. Use whatever you don't eat to make more compost.
-About plagues and pests. The recommended method here is to increase diversity. Not only crops, also herbs and flowers. Three to ten different varieties in the same bed is Ok. If you get some pests don't use pesticides, let that plant die and replace it with other variety. If everything keeps dieng, let it fallow for a year. If ever, use fencing and nets. Gardening is quite enjoyable when you don't overdo on saving individual plants.