there is no perfect dimensions for an island. Try to organce space subdividing into smaller cabinets of 60x60 cms which is the max space for a structural division and works for seating area as well

16' long is a lot of room. Can you post a pic of the rest of the room? Remove every door you can. Every doorway does not need one and doing this one simple thing will remove a ton of bulk and make your space feel more open - no need to remove the hardware if you think you might want the doors back sometime in the future. Are you up for painting the walls and possibly the trim? Is this a sectional? If so, you might have to split it in order to get it to fit. The curtain into the bedroom is a good thing. I have used that idea, I love it, and I am not from India! Change them out for a lighter color and add panels to the ones you have - make them at least 3x fuller than the doorway. Pull them all over to the hinge side of the frame after the door has been removed. Your pictures need to be rehung and you can address that once you have found a furniture arrangement that works.

HI there, Yes, our site can't upload renderings unless they are jpgs or png, so i have converted them for you..

TJ, Your Pooja place is not in the desired space but yes it is a practical solution. Try to leave a foot from the bathroom wall. Kitchen is in ideal spot. I can see that you are trying to move the hob point towards east however, it may not be practical here as it is getting quite close to sink.In case you plan to move the hob, then you may want to get the utility door shifted towards north to give you some cooking counter space.