Proportions in this bedroom are out of place. The bed is quite large and bulky to look at, and it covers most of the floor area. If you are planning to change the bed, then you can replace this with a smaller bed, preferably a floating bed(with no heavy storage beneath). It will give a sense of larger floor area.

Next, the sofa/couch can be replaced with a narrow wooden console/table against the front wall. The artwork which is now hanging above the headboard can be kept/hung above the wooden console. The console can also have other accessories to decorate it.

Now, the ceiling is not visible in your photos but the walls can change the look of this space immensely. Dark tones will close the space in and the room can look like a small box. You can go with lighter shades/hues for all the walls and add a texture/wall paper on the headboard wall.
If you keep the same furniture, then colours which you can choose from are:-
Light/pastel shade of teal
Mauve or lavender
Very light shade of pista green.

The headboard wall can have a deeper texture of the same colour and you can hang a round decorative mirror which will reflect more light in the room.

Make sure to choose curtains and bedsheets that complement the wall colour.

These are my suggestions. However, it’s always better to take more opinions.
Hope it helps!

Do share the pics of the final makeover!

That's a nice sized bedroom. Would you be opposed to paint? look on YouTube at a channel called 'three birds rennovations' they completely redo a kitchen and bathroom with pain and soft furnishings with out any change in cupboards or furniture. Light colors go a long way in making a place feel lighter and brighter.

you should do it all white and light grey and get your bed edges cut down and make it little flat and can put up nice paintings or diy hangers on your front wall. and also good pairs of fur carpets ahead your bed. and some lightning

Thank you all for your suggestions, I cant really change any furniture, but will make the noted changes in furnishing and paint.

first of all paint the wall and ceiling,

before wall painting if u can spend money then change the switch board and get some branded one...

remove the plate above switch board which was earlier used for wall bracket, but now because of wardrobe shutter opening will damaged the lights thats y it is not fixed n not possible...

match the color of wardrobe wood patti according to the existing laminate shade color, also check beside mirror wood patti...

picture frame refix it properly on top of bed location in center of bed on wall.

Check if the white marble need to repolish than decide whether u like matt finish or glossy finish.