Studio apartments are always small, and nothing could be done with it. But there are some tips on how to make them more habitable:

-Try to create different zones, as the shape and overall size affects the setup of the studio.
-Work and play with the space you have. Use mirrors to make space look larger and brighter. Try to use room dividers as curtains, sliding panels or folding screens to separate one area from another.
-If ceiling height allows, consider building a loft or mezzanine area.
-Think of multi-functional furniture pieces like sofa-beds, beds or benches with storage spaces.