Immediately try to figure out what broken ability I have since I'm now an isekai protagonist. ... then promptly exploit it in order to utterly wreck Garlemald and learn every job in the game.
And also fantasia into an Au Ra, if I were not already one.

All the while, I'd be gaining friends who would, inadvertently and unknowingly to me, become part of a harem-like group that you always see in isekai.

After that, I suppose I could find the Asahi guy and punch him in his teeth.
Hard.
With an axe.
While using Inner Release.
... I hate him so much.