This is the perfect starting point for absolute beginners. It strips away the jargon and focuses on how humans actually interact with their environments. Core design principles. Key Learning: Contrast, balance, and rhythm. Best For: Hobbyists wanting a cohesive home look. 2. Color Theory for Designers and Decorators
Free content is typically 1–3 hours long. If you'd like to dive deeper, let me know: best free interior design courses (udemy)