So you have chosen to go freeze dried? It's good to start with one venture (FD, versus frozen, versus, etc) - This will help you streamline the process, and to build a business and customer base. Then, when you are doing well with your product, you can start introdcing other options.
You will obviously want to build relationships with the sources of these ingredients - wholesaler, or direct. Then, you will want to test out different processes to make sure you are successful in freeze-drying, etc. (Or are you sun-drying, oven drying etc?)
I would write down a clear outline of what you want to offer, and the steps from a concept, to a finished product, and then do taste tests, literally, while at the same time, think of your branding. You want it to stand out - since there are so many different ones out there today, that you need something that will set you apart from the rest. (This could be price, the brand, the packaging, etc.) And then I would do a door to door with local stores to get your foot in the market, literally. (Do the same here, too.)
I have a rare plant business, that I started from scratch, so I know exactly what you are going through, and it takes a lot of thinking and planning, but most importantly - doing. The "doing" is the only way to get the necessary trial and error, which will show you what works, and what doesn't.
But - the first question you need to answer for yourself - is; is this just a hobby, or will this be your life? To make it successful, despite obstacles, you need to live and breathe the business.