Based on the Timmverse Superman, which is my favourite version of Superman. This Superman really does believe that he's a human, When he first goes into space it's in an astronaut suit, because he has no idea that he can breathe in space. This version of Superman was significantly downplayed compared to his comic book counterpart. Where as in the comic he could lift millions or billions of tons effortlessly, this version struggled lifting trucks, construction equipment, roadways, etc. While that may make it easier on the writers, I do prefer a Superman that can't wipe out a solar system from a sneeze.