Generate a full detail guide on composting for beginners. The guide should demystify the process and make it accessible. It must include detailed sections on: 1. The Science of Composting, explained simply. 2. A detailed 'What to Add' (Greens) and 'What to Avoid' (Browns) list. 3. A step-by-step guide to starting a simple compost pile. 4. A comparison of different composting bin types. 5. How to know when your compost is ready and how to use it in your garden. Please include a supportive disclaimer.