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Hi! I'd suggest just letting him be for now. Let him finish his buisness before disturbing him. If you are really concerned about the humidity, you can always mist one of the corners of the enclosure without disturbing him for now..
She looks ok to me. I'd leave a water dish in the enclosure if you don't have one in there already. You might want to think about getting a deper enclosure for her if you want to have more substrate and room for her to burrow, but she looks ok from the pictures.
Welcome to the hobby. Just be patient and do not disturb your T. Premoult can vary, but don't worry, even if you don't see it for a month. Mine has never taken taht long, but you really don't want to stress out your T any more than it already is. It can be very tempting to dig it out, but...