Hello dear client,
Your request was to create open floor space on the main floor and new bedroom and bathroom in the attic. The problem with creating the open floor space on the main floor were existing structural pillars which can be removed if you put a load bearing beam to support the weight of the upper floor and that way you can get the open concept space which you wanted. It is even possible to remove the ceiling above living and dining room and create a large loft space. In the attic the problem was that the roof is too low to create a proper bedroom, so I would suggest lowering the floor above the bedroom or raising the roof, but it is possible to create low ceiling bedroom with mattress on the floor (for sleeping only) if you don't want to do any of that. New bathroom in the attic is situated directly above the existing bathroom and the second bedroom is therefore much smaller than before. In the attic I recommend putting some roof windows to add more light in the space so it will feel bigger.
Best regards.