You can take courses on interior design at community colleges and major universities. There is also a tremendous amount of information about design and decorating in books and on web sites. Consult the sites for furniture makers to learn about their products; many manufacturers offer impressive catalogs to decorators, and some have sales conferences and demonstrations of products. Become an expert, or attach yourself to a knowledgeable associate who knows about upholstery, carpeting and other flooring, wallpaper and paneling, and other furnishings. Make contact with manufacturers of lighting systems, audiovisual and computer furniture and fixtures, and office presentation equipment. Plan on attending national or regional interior decorating shows and conventions where manufacturers display their products and conduct seminars.
When you will publish your business of interior decorating service, you can post flyers and ads at community centers and retail stores. Furniture and home supply centers may allow you to advertise your services in their stores if you promise to direct some of your customers to them. Contact area contractors. They may want to have a model home decorated and in return would allow you to promote your service there, and they may be willing to give your name to any client who asks for a designer. Offer a commission or bonus for work they send your way. Ask friends and acquaintances to recommend your services; offer a bonus or discount on future jobs for any business they direct to you. Do the same with satisfied customers. Create a portfolio of jobs you have completed; obtain permission from clients to take photos for the portfolio or for a web site. (You don’t have to identify the names and addresses of clients if they prefer anonymity.)