For swift results, fill the entire compost bin or heap at once as a larger mass will generate more heat. If you’re filling as you go, each time you add green material, add some brown too. Turning the heap once a month is usually recommended.
This means using a garden fork to move waste form the bottom to the top. The idea is that this oxygenates the heap and enables micro-organisms to thrive, aiding breakdown.
Eventually, you can stop adding ingredients and leave the heap to mature, covering it to keep out rain.