How to become an Interior Designer: The first step is to decide what type of design you want to specialize in. Do you want to design residential spaces, or commercial ones? Maybe you’re interested in sustainable design, or historic preservation. Once you’ve decided on a focus, the next step is to get some experience under your belt. You can do this by interning with a design firm, or working as a assistant designer. This will give you a chance to learn the ropes and see if this is the right career for you. If you find that you love it, then the next step is to get a degree in interior design from an accredited school. After graduation, you’ll be ready to start your own firm or work for an established one. With hard work and dedication, you can build a successful career as an interior designer.