There are weeks and weeks of lessons within CBU. They are a combination of face-to-face video, plus over the shoulder video. There's also a downloadable written portion (green arrow in the image below) where you can see basic highlights from the video portion. Though I love video, written stuff is easier to review. No need to watch a 20 minute video again to just get a refresher!
Interest in the niche. Passion/huge interest is a bonus. People really underestimate this point. You’ll be eating, drinking and breathing this product/niche for weeks, possibly months and years to come if it’s successful and you start focusing on growing it. Having an interest in it makes things so much easier and helps you keep going when things get tough.