Hey, sorry you're not getting many replies!
I don't have any experience with these critters, but I've been doing some reading and it appears they enjoy a moist habitat. I would say put them on coco fiber and keep the humidity about 60-75% is good. Adding moss onto the substrate would also be a good idea to keep humidity and provide shelter. I have read that they don't get very large, around 3-3.5 inches. They also like to stay hidden. Hope this helps!