what is the setting it takes places in
is it an endless dessert were the sun feels like fire on your skin leaving many to seek shelter underground, a world were all land has long sence sunken beneath the waves leaving only seafaeing people and floatng cites, perhapes a world were to forrest are sentinet seeking to consume all thats around them, or mabey a world were the night berings unknow horrors and its forbenden to walk in the dark
these thing will pay a major role in your world building and how your charters will interact with the world around them, for example if we take the endless desert, the sun wil obvously paly a major role in not just how humans and there cities are built but also the exocsystems that exist there, with there cityes being built underground most habbitations are robly notcurnal working at night when the suns out of the way to do jobs that require them to be above ground. it would most likly also cause civilizations to take undergroud cave systems as major trade routs perhaps even makeing fully man made tunnles for travling between major citties. in this world alot of the animals would porbly be noctural and borrowing spiecies as well perhapes most plants are even nocteral ethier to take atvanaes of the time animals are going to be most active or vice versa. And with such drestac changes happening on a day to night cycle it would porbaly cuase the same ecosytem in the day to look and act drestical different from the one at night.
the religion and belif systems of your charters impact the way your characters percive the world to interact and will likely be heavly dependent on your setting, lets start with the big one relligion. the major things that will impact your reilliogin is how quikly information travels in your world this will effect how widely spread your relligions might be and how much regional differentces there will be over the area your relliogion has spread. as over a vast area with slow communication it is more likly for there to be town spifice storys or even belifes sourrunding the relligion. (This is why theres so many dfferent flavors of catholithisum today)