You are so very welcome. Calla lilies are known botanically as Zantedeschia. Try and say that fast 3 times!

I'm thinking you are in hardiness zone 8. That would mean you could plant your bulb in the ground and leave it there. They will even take a moist spot.
Here's several options for planting or keeping your bulb.
https://www.botany.com/zantedeschia.html
Newt