I Got a Cheat Skill in Another World and Became Unrivaled in The Real World, Too, (Light Novel), Vol. 1

A fairly bland wish fulfillment isekai starring the author's self-insert. The first chunk of the book is him leveling up and explaining in excruciating detail how awesome all his gear is, and how he went from level 1 ditch digging to level 100 ditch digging or whatever. The middle is him back in the real world, where anyone he talks to can only say “wow you're so awesome I love you”, and the very end of the book peeks a bit at the fantasy world he stepped into. The MC is dumb as a bag of rocks like your usual dense protagonist, and completely merciful to even those who are actively trying to kill him. The other isekai world seems like it might be more interesting, as the Japan-focused part is just the author jerking off to his own wish fulfillment fantasy. There's also zero conflict.

If you have absolutely nothing else to read, I guess this might scratch that itch.