Not so long after release, modder Zulliethewitch managed to bring the Dark Souls first-person mod over to Dark Souls 3.
Play Dark Souls 3 from the King’s Field perspective.
The mod switches the perspective from third to first-person, but because the game wasn’t designed to be played from that view, you will see floaty hands and the like.
You can download it from here, but the general caveat of playing offline and backing up files before running it, still applies.