From a lazy designer..................

This is the USA SITE

Please convert your plan to feet/inches and note openings with a dimension. I would have assume the bottom of the plan is a window, it is a room with NO window? where on earth is your locale as this would be an illegal bedroom, USA.... show the other angles of the room. "Same furniture". I see a bed and side table. Do you have other furniture? What do you want to do with the "wasted space"?

Do this homework, and return in a comment box below.

You could try putting the bed head along the long wall on the left theres hould be enogh space there to try that. Not sure what the issue for use of space you will need to expalin what you want for the whole space

What are the dimensions of the room? It looks long and it very wide which is tricky!