Interior design courses can help you learn space planning, color theory, furniture arrangement, and lighting design. You can build skills in creating mood boards, selecting materials, and understanding client needs. Many courses introduce tools like AutoCAD, SketchUp, and Adobe Creative Suite, that support visualizing designs and presenting concepts effectively. You'll also explore key topics such as sustainable design practices, historical styles, and the impact of design on well-being, giving you a well-rounded understanding of the field.