I'm at work until 9:30, but after I get home I'll post pictures of the set up.
With that being said, please be kind with your words if I have a few things off, or not up to standard, I'm learning. And I have a few extra tanks if I need to change anything, or if the one she has isn't adequate.
Her warm side of her tank reads 85-87°, cold side never seems drops below 74, we also use digital probe like thermometers for each side, they're left in the terrarium 24/7. Humidity seems to fluctuate between 56-58%. That's one I'm actually struggling with maintaining a steady humidity. So I'll be purchasing the "monsoon mister" set up to use. It has a timer on it to turn on after so many hours, most for however many minutes/ seconds you set it too, and hopefully that will help make it more steady.
The bag of rats I was given, one bag says pups, the other bag says weaning? The weaning rats look a tad bigger, I've tried giving her one of those too with no luck. But I do believe we sell large adult size rats at my work, should I try that too once my husbandry is just right? I'm so scared she's going to starve.
We have not been holding her since her first unsuccessful feeding, only when necessary (like filling/cleaning her water bowl that she likes to wrap around).
Also, the previous owner also used a snake rack indeed of a terrarium set up, could that be another reason she's having such a hard time adjusting?
Thank you all so much for your help so far!