Go for the north east corner for your living/dinning on the wall of balcony .

best place for your worship area..

The other alternatives if it need not be a large elaborate affair, it could be positioned near the position marked by a circled H in the living room of even on the bedroom pillar on the East at the entry of the passage.

In the area marked as Foyer(not sure why?) Near 7'9" text would also be a good place.

As per vastu, Puja Room should be located in the north east corner of home , you facing towards east while praying, so plan it accordingly.