Danmachi: With a D&D Character sheet in the Dungeon

Falling into the Astral Sea sucks. 0/10. Do not recommend even Temporary stay. Between monsters and heavy winds it's to dangerous and sleeping places can only be found with corpses from gods. To be true full I don't even remember how I got here. Thankfully meeting a God who helped me leave was a stroke of luck. However I don't remember living in a world were Horse drawn carriage was commonplace and a city with a giant tower in the middle. AND WHY DO I HAVE A LEVEL 20 CHARACTER SHEET IN MY HEAD??