When we first moved to the country, I had a long list of all the heirloom varieties of vegetables that I was going to start from seed. Then I went to our little weekly Growers Market and found literally everything on my list as transplants. Let's face it. Most of us home gardeners really only need one squash plant, one each of several different types of tomatoes, etc. My first vegetable garden had way too many of each thing. So now I'll buy one yellow crookneck squash (so delicious cut in half, brushed with olive oil and cooked on the grill), a Brandywine tomato, a Costoluca Genovese (how much did I murder those words?), a grape tomato, a six pack of basil, a couple of oreganoes. And, although our winters get down in the teens regularly, my rosemary gets whacked with the loppers at least once a year.
If you want an excellent book on small scale gardening check out "Square Foot Gardening."
Just a few words above from an always-beginner gardener.