Isekai is just Fish Out of Water on steroids which itself is just a variant on the Hero’s Journey monomyth.

Isekai are popular because people like to explore what if scenarios just in general. The Isekai setup is just a convenient plot device, that’s all.

That’s why I recommended it. It’s baby’s first isekaia, basically.

Nope, that’s correct. I misremembered.

FCLC, Cowboy Bebop, Sword Art Online, and Frieren would be good ones to start with.

FCLC: modern setting with absurdist and Sci fi

Cowboy Bebop: future setting, Sci fi meets western

Sword Art Online: modern characters in a fantasy setting, fantasy with a tinge of Sci fi

Frieren: fantasy setting, plays with tropes of the genre so maybe leave this one until you’ve watched a couple of more traditional fantasy set series. Hard not to recommend it to everyone though.

The problem with recommending opm as a starter is that it parodies a bunch of shows and Manga that OP probably won’t have the references for. I would worry that OP might miss most if not all of the jokes without the context.