I believe oneironaut is pronounced oh-nigh-ro-not

Waking up naturally is definitely possible. One thing that can help is using self suggestion before falling asleep. Telling yourself to wake up at a certain time usually works. If not, there is always the alarm.
For wild, its good to have an anchor to help carry you through the transition. Whether that is an external anchor like a fan, or binaural beats; Or an internal anchor like counting, being aware of breathing, and singing in your head, that can really help with wild. Internal anchors are a bit tricky because they can keep you awake. So practice the anchor until you feel aware and ready to fall asleep. There is an element of letting go during wild. Eventually you have to fall asleep and if your anchor works, it should hold your awareness just enough to carry through the transition period.