Use the search feature on feeding in another cage. You will find cage aggression is a myth and hardly anybody does it unless feeding live. In many cases and can actually create stress and keep the snake from eating. Also moving a snake in feed mode is putting you at greater risk of getting tagged.
Leaving the snake alone at first is good but don't be nervous around the snake. Make steady, deliberate movements and you should be good. Just know that a bite from a ball is nothing and is often described as brushing against Velcro. Plus once you get tagged by a snake you get to join the bite club. I can tell you to much about it yet since you cant join yet.When it happens we will need pictures.