Trying to use an orthographic camera in interior scenes

Hi, I'm trying to make a 3D animation movie look 2D, but I'm new to orthographic cameras and whenever I try to use them in my scene they look god awful, and in most interior scenes I can't even get inside.

This is what it looks like in orthographic camera mode...as you can see i can't get inside. I've tried messing with the size variable and the position x y z but it just isn't happening

and this is what it looks like inside using perspective view

Does anyone know how I would go about doing this? Thanks!