The whole shifting thing, explained by:
So you choose a method, and when you finish just fall asleep and you will wake up in your desired reality. No, you can't stay forever. No, you can't die either, if you die u come back to the normal non-oniric world.
Raven method: count to 100 (don't move meanwhile) when you feel you are sleepee teepee, open your eyes slowly.
Oh, and make a script.