Building the Afterlife - A System Kingdom Building Litrpg Fantasy

There are many stories of what happens after death, but what if you're the one who has to help the souls to get to and enjoy it?

James thought that after he died in an accident, he would just fade into nothing. But seems like thats not going to happen. Turns out someone forgot to give earth an afterlife, and now its his job to build one,while managing an undead empire in the process. How will it turn out and what of an afterlife will he build?