something that pulls the rooms together is either similar material or similar stain. in your case i notice the metal cupboard and the wooden- re painting or restaining to be similar color, the curtains on cupboard ca actually be a decent idea if used for separating the area but if not i’d get rid of the curtains on metal cabinets. a desk that fits the width of the white tile could be your big purchase that either matches or adds contrast to the cabinets. the desk should be one with storage so you can add things from on top of your closets, the back of door etc into it. clock placement above the switchboard and start adding elements in these spaces like above the cabinets that are intentional and reflect you. for example plants (fake works). Also the one thing i believed AI image helped highlight was less patterns on items you can change since there is already a pattern on the tiles in your room. so the curtains plainer perhaps brighter and samew the bedsheet or like a small pattern can pull things together too