you have a lovely house but unfortunately it seems stark! you will need a lot of effort time and cash to get it all decorated in a homely manner. I mean cozy and warm.
The 1st picture showing your LR wall painting hung seems to small for that area. Either take a get a lot of small similar sized frames for that wall or get single huge paint or picture for that space. corridors can be decorated with the souvenirs collected from all over the world. Some people are crazy for masks. I have a friend who has this wall full of different types of mask collected from her visits to Africa, Thailand, China, India and other parts of the world.
The preference is totally yours as after all its your own place and you will spend time there with your family so select some item or theme collectibles of your choice.
Jeanne