You're doing great! The only thing you might think abou changing would be, yes, the sand. We did exactly like you, using sand as a substrate, for nearly two years--and never had a problem.
But some do, and I believe the stories.
The problem with the "edible sand" is that (according to various online sources which do seem credible) it's really not all that edible. In some leopard geckos, they wind up swallowing too much sand over time...and eventually it clogs up their insides. Not a good picture.
So we eventually quit using sand at all and went to plain old paper towels. Our Missy seems just fine with that and has even discovered that she can lift up one layer of towel and slide under there, using it like you or I would use a simple blanket. She loves that!
So do the crickets, of course, 'cause they can scoot under and hide anywhere the paper towel edges are even slightly loose.
Overall, though, it sounds like you've pretty much got it figured out. Congratulations, and enjoy!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.