look here for inspiration: https://www.pinterest.com/lenecunis/small-hallways/
Maybe this will help you!
I would give the hall a fresh coat of paint and update the lighting. You could also do a gallery wall on one side, or a striped accent wall on the end wall.
Small hallways are the perfect place for a fun accent, like wallpaper, a bold color choice or a brightly colored runner. Updating the lighting is another fun option.
Some panels on the lower half of the walls would also be a fun idea. Good luck!