Nina Jay said: "On the topic of being an introvert at the market place: it can feel scary at first. Me and my husband are both introverts, but we manage
We manage it about once a month, that is. To do it every day is a job for an extrovert, I think."
I definitely like the advice to know the details well in advance! Starting the day well-organized and feeling on top of things can only help.
I know that if I have a canned speech and/or set of responses to FAQs, I can fake extroversion really well.
First, because I can start with them, and then move on to more individualized outreach. Second, I can put myself into kind of a role - in your case, of "farmer", or "educator", etc. Then I'm less worried about what the person thinks of *me* and can more objectively work on improving the role, and thus the outreach. (Yes, there are authenticity issues that could arise - ymmv.)
So maybe having a factsheet available to give out + in your head, about your farm, about how you're growing, about specific interesting produce... could help give you a few prompts + starter confidence?