I push all the sand to one side of the tank. Next, I place two bricks at right angles to each other, in an "L" shape, giving the bricks the corner of the tank. Next, I fill the area in the "L" with sand, then add some water. Mix the sand by hand, until it is equally damp, put not too wet. Also be sure there is no dry spots.
Over the top of the bricks, I put a large flower pot base, or a large flat rock. On one end of the flat rock, or base, I put a small flat rock which acts to prop up a side, so the lizard has an easy access.
I'd say my sand is 3-3.5" deep where the lizards lay. I try to get a bit of light focused on that area, to give it some warmths too.
The privacy was a good idea. Make sure you shake those crickets or mealworms in a good calcium product at every feeding. If she is very close to laying, she probably will not eat. Since it is also a potential wildcaught lizard, there is a chance it will not eat for a while too though. Luckily, I've found that gravid females will usually eat if they are not too close to laying.
I remove the eggs as soon as I realize she has laid them...she will be obviously skinnier. I put them in a delicup, in which I have Perlite as a substrate. I dampen the Perlite, and keep the water level about 1" below the eggs. I either cut a large (nickle-size) hole in the center of the lid, or just lightly set the lid on. Eggs should hatch in 45-60 days. The female may also become gravid again within the next 3 weeks.
Best of luck, and congrats on the purchase. Let us know if there is anything else.