Not the easiest thing to do. But the most profitable. Requires a small start-up capital. However, everything will quickly pay off. The choice of direction depends on your specialty. A business form can be any - an online service, an online store and other options. Only a business idea is needed. Where to find this idea ссыль - will tell.
Such a business can be any direction that meets the remoteness condition. From building sites to providing digital services. Some of them can be distinguished by separate points.