Thanks @Lija!

I do have 3 sides of the tank covered (2 with a black heat mat, and one side is up against a bookshelf wall) so he can only see out of the front. In the pictures above, he's actually up against a cave I have in there for him, and there are some leafy vines on the back wall covering part of the ground, too! He hasn't really explored any other areas of his tank so far though. He just made a little nest where I plopped him in the tank, and he will bury himself and uncover himself throughout the day/night.

I'll try your advice for the next few days! Grab some larger crickets and see if he'll eat some in a day or two.