It is also difficult for me to perceive how life after death would mirror the life we live here on earth, even if this is just for purely logistical reasons.

It is preferable for me to think of it as a repository of souls, coalesced as one entity.

Turning to science, there's the probability it could be the Initial Singularity of quantum physics, but gifted with the ability to share as one, the experience of all its constituent souls.