How to solve difficulties with improper organization of the area in our house? Development of the area of interior design as a response to our demands

Planning our house sufficiently, choosing sufficient furniture, that would fit other parts like for example walls, floor etc. is a task that is really demanding. It is indicated by the fact that there is no complication in going to a store and saying that we want some piece of furniture delivered to our house (obviously in case we have sufficient amount of money).