Hi kristinfleig! I'm guitarangel's sister and am working towards starting my own floral business. (I'm quite obsessed with Pinterest too. My floral design board is insane! ) I find myself in the same place, a bit intimidated by the monumental task of starting a business and a successful one at that. My dad has encouraged me to create a business plan first. Envision where you want to be then break it down into simple, achievable steps. You might look for a book Business Management for Dummies. It will give you the basics on how to start and manage a business.
For starters, I would try to arrange interviews with people in a similar business to see where they started, what they wished they knew starting a business and what advice they would give to other entrepreneurs, etc. Also research the concept of survivorship bias. Below is a link to an article that we found that addresses survivorship bias and how it effects our thinking and decision making. I hope this helps and good luck on your business!