Is that his new Barney cage? It looks very nice and he looks happy
. A couple of suggestions/comments if you don't mind.
1) His wheel is super tiny! He needs a bigger wheel or he'll get back pain.
2) It looks like you've got fluffy bedding or kapok in there which is dangerous stuff so best removed. The safest nesting material, and they like it, is sheets of plain white toilet paper torn into strips.
3) The shredded paper would be best replaced with standard substrate. They can get paper cuts and also the ink isn't good for them.
A nice big house might be a good thing to add so he can build a big nest with the strips of toilet paper. A shoebox house would be fine if you don't want to buy one. You cut the base out of the shoebox (so it's open underneath and sat on the substrate), cut a hole in one of the long sides at one end (so the other end is dark). And use the lid as a lift-off roof so you can check inside without needing to take the house out, so his nest doesn't fall apart.
The roof can also double up as another level for a food bowl eg. If put a bendy stick bridge over the door it adds a tunnel entrance, makes it dark inside and is also a ramp up to the roof