I like the little square windows but wondering if they are properly placed inside and will they offer light, views from seating area, ability to open and allow fresh air in? Besides the design also consider how they will be used.

You can do white entirely. The dark brown tiles will become the highlight. You could do dark brown only for the lines on your compound wall, or keep it white as well. Do Asian paints white without mixing any blue. Also white keeps the room temperature cooler.

Sir you can use Wooden textured ACP as it will be cost effective solution to cover Soil pipes and provide a modern look to facade .

looks good as it is. The front balcony doors may need to be hidden from view using Jali or Timber slats. You may also need some sort of rain protection for the balcony.