Yeah, I know what you mean, if the dwarf whisperer has problems understanding them and figuring out their needs, imagine regular newbies
Sometimes a step back is necessary to step forward.
I think that thanks to your advice Blacky now usually comes out of his nest when he sees me even if I don't have food, and he watches me while I spot clean or while I put some order in his cage, then when I finish he walks a little bit to check that everything is ok and then he goes back to his nest... so thanks!!! You'll figure out what's best for you too