Answer : Interior design is a profession that involves the observation of people in their interior spaces to identify and strategically plan for problem areas such as functionality, ergonomics, environmental comfort, psychosocial issues, ecology and economy. It's imperative to understand the needs of each person in order to effectively create an appealing but functional atmosphere.
This person can't be given a blank answer. The question wants something helpful and informative so they can learn how to do it on their own if they choose not to hire someone else. A good way is through browsing websites like Pinterest or Houzz for inspiration or hiring a professional interior designer who has ample experience working with people just like them!