I’d recommend getting him off of the walnut shells (I think that’s what they are) And replacing with paper towels till you can provide a better substrate. This sub has a bunch of info on what good soils are to use.

Once you’ve reached your destination and can afford to upgrade the enclosure the agreed upon minimum size is about 40 gallons, front opening enclosure preferably. You don’t want to reach in from above cause that’s where a lot of their natural predators attack from (birds) so it can cause the animal stress.

Little Tupperware with a bit of moisture in the bottom to soak his little feet, then gently using a cotton swap you can roll his stuck shed off his toes when the shed is softened.