Ohh trent people species, that's unusual~ I'm so glad the first few humanoid encounters are not freaking elves or beastmen!
By the way, yasss a hot (albeit zannen) thicc zaddy protagonist in isekai! That's so rare it's usually (pretty) shounens and shoujos, and when there are ojisans they usually reincarnate and restart as babies anyway or are actually kinda sloppy/not hot anyway. The only other isekai-themed hot 'n thicc zaddy I know is from The Ultimate Middle-Aged Hunter. Like me some muscular non-bishounen/plain male protagonists.