If I use this card's {Hand} [Main] effect to digivolve BT21-055 [Sunarizamon] into this card, ignoring digivolution requirements, does the combination with BT21-055 [Sunarizamon]'s effect make the digivolution cost 2?

Can I activate this card's {Hand} [Main] effect at the same time as an effect such as P-107 [Defense Training]'s effect that digivolves?

Can I use this card's [On Play] [When Digivolving] effect to trash a digivolution card from another of my Digimon?