There is no such thing as a Desired Reality that is too out there to ever be reached. I mean, did you hear enough of the Hogwarts stories yet? Noting is off-limits. If you can think it - it already exists somewhere in the Multiverse.
Now the only question still and always remains - where are you? xD
Sure it might take some serious mental gymnastics to make oneself believe in something they initially do not believe in. But that too is a skill that can be learned and that becomes easier with time and practice.
If that is the case for you - start small. Can you believe in a reality where you just randomly get a free pizza?
If your mind automatically went like - hold up, free pizza? Where is that going to come from? It's rona time, ain't nobody gonna show up to my door with a free pizza!
Well there that is your rational mind giving you all sorts of beliefs that hinder you from reaching your DR with the free pizza. There is a way to bypass it by realizing, that you don't have to figure out the how. Allow the logistics to fall into place on their own. You just focus on how good pizza tastes and how fun and random it is that you got it out of blue for free.
You can try the future memories, where you remember having a conversation with someone after the fact where you tell them about this most random free pizza you just got.
All you have to do is make yourself believe, in whichever way you can, that you are already living the free pizza reality.
So, what is your Desired Reality? Do you want to go and check out Hogwarts? Or maybe some other "fiction" realm? Maybe you want to go on adventures with Rick and Morty? Maybe you already have your own secret pocket of space-time, that you wish to visit?
The only limits are the ones you impose on yourself!
Happy shifting and catch you in another realm! ^^