Correction: The original version has been dropped by the author so better not read that one. The reboot version is ongoing.
which ch is the best place to stop?
I have just started to read the novel today after searching at novelupdates and posting the links so I don't know much about it yet. : )
I'm on vol. 5 but I think it depends on your interest. This is a slice of life isekai story and doesn't have complicated conflicts so every volume feels like it ended well. Idk about the reboot, though.
I haven't started the reboot, but if i'm not mistaken, tl said that the first volume doesn't have that much change in the plot, and would go to a different direction around vol. 3(?) (I forgot so i'm not sure anymore)
https://www.novelupdates.com/series/the-man-picked-up-by-the-gods/ - original version that is up to vol 5
https://www.novelupdates.com/series/the-man-picked-up-by-the-gods-reboot/ - new version by the same author with some unnecessary parts taken off and new material added. People that have read both recommend this one. However, the translation is still up to vol 1 for now.