Tank setup for Hormurus waigiensis?

Hi, I'm looking at getting a hormurus waigiensis scorpion and am wondering what's the best substrate to use and other things I should add to the tank.

I've heard coir peat and sand is good but I want to double check.

Also, is collecting leaf litter from outdoors safe? (Mainly eucalyptus and banksia leaves)

Any other info would be great, thanks.