i am the universe

she got it by truck-Kun and died when after he died she came to a black void all she saw was a podium with a paper and it was a letter saying...
hey god here I got bored and I want to have a vacation I thought you would be an excellent choice to take over my place as the god for a while I gave you everything you would need to start the universe like...
*a book on how to maintain the universe*
that should be all, for now, I will check in with you every couple trillion years

some of the starting chapters are from
https://www.novel35.com/series/99351/i-reincarnated-as-the-universe/
so go and read that first
all chapters that are used I have permission to use