What if world as we know it is not real?
It is indeed not real in that sense.
Most people believe that we are physical. But actually we are not physical. We are spiritual. Currently we are in a physical human body. Being born on Earth is not the start, and the death is not the end. They are both transitions. If anyone would like to go deeper into this topic, then there are thousands of Near-Death Experiences (NDEs). I recommend the website of NDERF (Near-Death Experience Research Foundation). Currently it has 5271 NDEs, and it is regularly updated.