Leave some not all the media in the tank for the duration of the cycle. The bacteria take time to transfer, it will drastically help though in the cycling.
With the pure ammonia you want to dose it to a high level, 2-3ppm for a 20g tank. Keep the dose constant until you start seeing the nitrite spike. Once you see the nitrite spike and it will be big and quick using established media, cut the dose down to 1ppm, once the nitrates appear. HOLD OUT doing a water change, dose the tank again with ammonia to 2-3ppm or whatever your initial dose was. Your tank is fully cycled once the initial dose of ammonia is converted in 24 hours. Once you notice this, perform a massive 50-70% water change to reduce the nitrates, hey presto, your cycled.
Using the fishless cycle with ammonia, will allow you to FULLY stock the tank immediately once the cycle is complete.
PLEASE PLEASE be patient and while you are waiting for the cycle to complete, research as much as you can about the fish you intend on keeping. That way you can provide a suitable environment for them, before actually adding them to the tank.
If you require any further assistance, then please do not hesitate to post.