No, it is best to leave it undisturbed and then place into storage or a cool spot and wait for the flower buds to appear. Then you bring it out into the light and the rest of the leaves will show up.
No, I leave mine in and let it dry in the soil until the next blooming is wanted.
No here's Amaryllis info. https://web.extension.illinois.edu/cook/downloads/9226.pdf
No, I don't and it's fine!
Not usually. As long as it is potted in soil. There are wax dipped bulbs and they will need different care if you wish to have them potted.