Though oats and other small grains are definitely suitable for the home gardeners, you will need to have more space for them than you do for other fruits or vegetables. But that doesn't mean you need acres to dedicate to your oats in order to get a useful crop.
Oats are a good source of fiber, protein and carbohydrates. Oats cannot be eaten raw, and they can take a while to cook when used whole. Rolled or cut oats will cook faster. They can be used in granola, baked goods or just plain as oatmeal. In savory recipes, you can even use whole oats in place of rice though they take longer to cook.
You should plant your oats in a sunny location where it will be easy to access water for them. Oats need more water than most other grains, and you will probably have to water them if there are too many days between rainstorms.
Though they like moisture, oats will not grow well in low-lying areas where water accumulates. The soil needs to be well draining.
To sow your seeds, you just broadcast them out over the soil. Try to get the seeds evenly distributed. If you are going to be growing a larger area, you can get tools to help you spread the seeds. It saves your arm and will spread them more evenly.
Unfortunately, you will also have to go and cover all that seed once you're done. If you leave it all on the surface, you will surely lose most of it to the birds. Go over the entire area with a rake and turn over the soil to get the seeds at least an inch under the surface. One trick is to do your seeding right before an expected heavy rain. The water will beat the seeds into the wet soil, and do a pretty good job of covering without any more effort on your part.
Though they may seem like a lot of work to process (see below) there is little work to be done during the growing season. Because oats are grown in a dense patch, you can't really get in to weed them and the plants generally need little care.
You will need to give them a watering when the weather gets dry, which can be difficult if you are growing a large patch of them. But they don't do well in dry conditions, so either you water your oats or risk losing them.