You have a great floor plan with furniture placement ideas which will help when you are purchasing your furniture and decor items. The next step is to use houzz.com to put together idea books of images that you like for each room. Then you should find a local interior designer who will take those images and work with you to help you shop for everything and to select colors, etc......... Make sure that you find someone who is highly recommended and who you are comfortable with. Also, call their references and make sure that their past clients loved working with them and that they worked well with their budgets as well ......

cool --but you can see the entire floor has been raised--do you have the ceiling height? a closet 'step up' would be less of a structural commitment, OR a buildup under builtin furniture--like bookcases flanking a fireplace, also some great ideas on HOUZZ i'd never have thought of. sorry i'm not tech-ie enough to paste the site:) of course if you go 'structural' --all walls and ceilings are fair game as well. remember that ease of access [or lack thereof] can affect stealth mode greatly--as in your pic: every time you step onto the 'box' in your pic you would hear a 'different' sound.

Your best bet is to contact a local designer in your area. For the kind of work you are looking for you need someone with local knowledge http://www.houzz.com/professionals/c/Mumbai%2C-India

based on your location details, you have to choose n discuss with