You can go straight from being awake to a WILD without needing to sleep for 5-6 hours prior to it. However, it's pretty difficult to do.

Quick edit: Please correct me if I am wrong. From my understanding, a wild is a wake induced lucid dream in which you can attain through concentrating on an idea and keeping your mind occupied as your body enters the sleep state. This tricks you into sleeping while having your mind awake.