You can do a couple of things. You can use the 8 Mansions Method and find the fame area of the house, and hang the paingings there. Or you can find the fame area of another room, and hang a painting there. Just make sure the room is one used as family living space, or as a home office. You should not hang thins in the bedroom.
A painting that is pleased to eye can be hanged any where. Some say you need to see a best direction. some say you do not need any good direction. but when it comes to fixing nails to hang a pinting is ver important. with the knowledge i have you need to look for a good date and time to nail for hanging picture.