Hello and welcome - Django is gorgeous! He looks so cute there and looks to be enjoying the cage
He has lots of nice things to do in there. He already seems quite confident out in his cage. It looks like Aspen substrate to me
. I am sure he will decide on a nesting place and build a nest soon. Sometimes if there isn't a large house that's dark inside, they will just sleep under substrate. The main thing is to have a big pile of torn up strips of plain white toilet paper - so he can take some to build himself a big cosy nest. I can't see everything you have in the cage, but adding a shoe box house could be good - it makes a large nesting box that's dark at one end (the end away from the door). You just cut the base out of a shoe box, keep the lid for a lift off roof, and cut a hole for a door - ideally near one end of one of the long sides (so the other end is dark inside). He will probably move in and build a nest there.
Edit - if you put a bendy stick bridge over the door as well it makes it much darker inside and they also like a tunnel entrance - plus it makes a ramp onto the house roof so that can be like a platform to put the odd thing onto - eg a food bowl or other item. The advantage of a lift off roof is you can check inside occasionally (not too often as they can abandon the house if you take the roof off too much) and check on things or empty a litter tray - because the other advantage of a large shoe box house is - you can fit a corner litter tray inside at the door end at the back and they invariably use it as a toilet! So that helps keep the cage clean and dry and reduces the number of cleanouts and spot cleaning needed. You just take the roof off the house and empty the litter tray once or twice a week. You can just put the usual sand in the litter tray. I use this type of thing which is a good size for a syrian and fits well in a shoebox house. They almost always nest at the end furthest away from the door because it's darker there, so a good place to put the litter tray is at the other end - the back corner opposite the door. This link shows two but I'm sure you can get single ones. Just check the dimensions - this one is the right size but some are huge - for rabbits eg!
Hamster potty litter tray
I am always trying to chat with him when he's coming out of his burrow, wich he made in coco fiber. I put him a little handmade corner house in there and Django spends most of his time there. I am still upgrading his enclosure by adding this and that,and will post some pics of his new home soon.
