I... Don't know what to say.
As of the end of chapter 2, this seems to have the most evocative and solid world-building, and quite possibly by far the most gorgeous artwork, of any isekai I've ever read.
It's actually reasonably high up there on those points among fantasy manga in general.
If all the jokes and references went right over my head, this would still be a perfectly readable manga. And as it is...
I'm seriously impressed.