I need help;

I've never kept an Alocasia before, and I found this one freezing to death at the store, already 50% off in the clearance section.

I just used what soil mix I had, but is there anything better for it? It likes chunky mix, right? Can I use coconut bark/chips instead of orchid bark?

Can anyone identify the specific species of this plant? I only know it's an Alocasia because of the shape, since there was no label on it.

What can I do to keep it alive and thriving?