Get 2 buckets. Place one bucket inside of another. In the bottom of the inner bucket, make holes to let air flow in.
Put a layer of regular soil in the bottom of the bucket.
Mix different types of organic garbage and place them in the bucket mixed or layer by layer.
Cover the last(top) layer with soil - it will fasten the process and prevent smells.
Cover the soil layer with dry leafs. They will help to keep moisture and heat inside of the bucket.
Spray everything with water on a regular basis.
Water leaked from the bottom of the bucket can be reused and sprayed again to the same bucket.
Place it under the sun.