A {Hand} effect can be triggered/activated while its card is in your hand. Such effects can't be triggered or activated in areas other than your hand.

No, it digivolves from the Tamer as-is. It isn't treated as a Digimon that digivolves, therefore "when a Digimon would digivolve" effects and "when a Digimon digivolves" effects don't trigger. In addition, this digivolution requirement can be used to digivolve a Tamer even if a "Digimon can't digivolve" effect activates.

Yes, you perform a digivolution bonus draw. A digivolution bonus draw is performed for any kind of digivolution.

No, it can't. Even if a card digivolves from a card that was placed on the field in the same turn, it can't attack during that turn. It can only attack in the turns after it's played.

Yes, it is.If the Digimon leaves the field, that Tamer is trashed like normal digivolution cards.

No, it does not.

Yes, it does.