Welcome back to writing! XD
Interesting scenario you've added in your book's details. It's rare to find a novel that's actually about made-your-own mythology.
I'll add it to my reading list.
As for me, I'm making use of well-known mythology in my own novel, adding a bit of a modern twist to it. Here it is if you're interested.
Level Up Hero: In a nutshell, modern-day Greek hero mixes it up with eldritch-horror type monsters and megalomaniacal supervillains while the world's biggest hero trainer teaches him how to be a better hero. 