fictional worlds are very real, although u do not need to fully jump into one ot grasp the main purpose behind them, purpose seems to be everything and it is enough to make you happy with just understanding the purpose behind somthing to have to fully hop into that world.
this harry potter is possible even in this dimension, start stupid and climb ur way up, use ur imagination to ponder and try to think outside the box, the system will always nudge towards the directino you want ot go, be attentive and look for the signals and you will find a little somthing that will help u attain what u are trying to do.
remember u do not need to understand all of it to grasp what is possible or happening behind the scenes.
it seems that fictional worlds build the author that makes it seem that he created it. thats how they are more real then the words or thought u are imagining them from.
the entire PMR NPRM thing can lead to confusion but i will attempt to paint out a picture of it for you.
when hairy potter is in the magic school. his surroudnings are in PMR. when harry potter thinks up a thougt. that thought is in NPMR. the magic that happens in his world is like energy flowing from NPMR to PMR. this happens alot in different tones and variations. actually in all kinds of ways. but these are severly limited compared to harry potters world.
any being can become aware and become multidimension and influence things in other pmrs. and the nprms of those pmrs.
what tom is saying is that u can access and communicate with harry potter thought through his npmr and yours.