I really wouldn't worry about not handling her etc. I would try feeding her and see if she'll take it. It really doesn't matter if you use a uth or heat lamp just get a temperature gun. You need to use it in conjunction of the thermometers to get the surface temp.
If you're using a tank and lamp and don't want to put plastic or foil at the top I would use a bioactive substrate. Minimal maintenence and kept humidity up is easy
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