Because a lot of technical interior design work entails CAD software and tools, earning this certification is another good way to improve your resume. Becoming an Interior Designer — Route 1 Route 1 to become an Interior Designer is to enter into an University or college interior design program which you will earn a university Degree upon graduation. We will see all this during our visits to Florence and other Italian cities. What is the class schedule? Not Provided. While not all programs require the undergraduate major to be in interior design, many require the submission of an art or design portfolio to establish evidence of creative skill. These skills and knowledge you gained will eventually provide you the critical base to future learning and most importantly, your self-learning. Fortunately for most interior design projects, if you have the skills and knowledge, you are able to provide interior design services.