GTPs really are not that hard Just gotta keep them misted and yes they prefer width because of the temperature gradient and being able to pick what they want better.

You can tame them with proper handling. But the bites are going to be nasty when older. It is recommended you don't hold em as babies because they are very fragile. I have handled mine some but only very very very carefully and only on their decision to do so. For some reason they enjoy shooting out the cage and crawling up my hand/arm.