Most of it sounds about right. I have mine on regular play sand, and they seem to do fine. As for the wax-worms, let us know how they liked them. I can't seem to find any that are small enough around here to try as food. I generally stick to dusted crickets and phoenix worms (for extra calcium,) with the occasional small meal worm as a treat.

For the rest, getting the temps a little warmer will help once they start breeding, as they like to lay on the hotter end of the tank.

Depending on your set-up, you might have to get used to the fact that they just sprawl when they sleep, if you ever see them sleeping in a visible place. Other than that, they are lovely little geckos. Since you said you have a pair, you might get to hear them chirp to each other in courtship at some point.