Beans are either pole or bush varieties. Pole beans are nice because they let you grow a considerable crop in just a small amount of space, and they also bear over a longer period than bush beans. There are also runner beans, which we haven't grown, and shell beans, of which our only experience is one years' planting of edamame-type soybeans.
Start beans outside after danger of frost. We have done pole beans with 6 seeds around single poles. They need warm soil to germinate, and as soon as they do sprout they need to be protected from animal pests.
Our biggest problem with beans is remembering to harvest them before the pods get too big and tough.