I think the situation from Defending Your Life or Eternity seems pretty neat for an afterlife, but realistically I think that the best we can hope for a “heaven” is living on in good memories from those we leave behind.
Being reincarnated into a well-loved house cat would be pretty dope too.
But ultimately I think our consciousness just stops and we return to the same state we didn’t exist in, before we existed.

That’s why I always tell my dog on walks “Crows are Bros” and never let him bother them.