One of the things that can help you understand how to design your funnel is to consider the art of storytelling in your design and to use the parts of creating a story to help you design your funnel. Essentially because getting your customer to purchase is an emotional response not neccesarily a logical response. People but things because they like you and want to buy from you not because of your product. So if you can think about your funnel in with this perspective in mind you will have an easier time creating a funnel that converts.