They do the isekai thing so then the world building happens naturally as we watch the clueless dork explore the fantasy world and encounter stuff.
Otherwise you have to find ways to explain stuff to the audience when the characters grew up in that world and should already know all about it, so don't need to discuss things.
I think this is often what amnesia is so common in fiction, too, despite being extremely rare in the real world. It provides a convenient plot device, both to perform exposition and for some inevitable gotcha behind either their identity, how they lost their memory, or some other major revelation from their past (seriously, has there ever been a case of amnesia in fiction where they didn't conveniently forget some big, plot relevant thing?).
One way to do it is to start with a character that is native to the world but new to the social circles and strata of the story. So that the specific contexts of the story are also new to the character.
Maybe start the charachter in a profession that exsists in our world. The farmboy start like in wheel of time. Or the butcher start like in soaring the heavens. After all most pre industrial people wouldnt have traveled far from their place of birth and wouldnt know much about the world at large.
They do the isekai thing so then the world building happens naturally as we watch the clueless dork explore the fantasy world and encounter stuff.
Otherwise you have to find ways to explain stuff to the audience when the characters grew up in that world and should already know all about it, so don't need to discuss things.
I think this is often what amnesia is so common in fiction, too, despite being extremely rare in the real world. It provides a convenient plot device, both to perform exposition and for some inevitable gotcha behind either their identity, how they lost their memory, or some other major revelation from their past (seriously, has there ever been a case of amnesia in fiction where they didn't conveniently forget some big, plot relevant thing?).
One way to do it is to start with a character that is native to the world but new to the social circles and strata of the story. So that the specific contexts of the story are also new to the character.
Maybe start the charachter in a profession that exsists in our world. The farmboy start like in wheel of time. Or the butcher start like in soaring the heavens. After all most pre industrial people wouldnt have traveled far from their place of birth and wouldnt know much about the world at large.