I agree with most of the previous comments. I tell everybody about growing (part of) my own food. I regularly share my abundance: mostly fruit and sometimes jams etc. That can start conversations of all kinds. To those who are interested in growing, I show my garden. Since my garden looks different from what they expect, it starts a new conversation. There is always someting going on, and everybody is intrigued bij something else, so sometimes we talk about the weeds, sometimes about the mulch; the unusual fruit; companion planting, whatever makes it happen.
When people visit my garden, we have a cup of tea, and chat about whatever comes up, next I give them a garden tour. I almost never finish the tour. Somewhere I usually loose their attention. It can be that they are not that interested. Some people are, but get overwhelmed by the information and the new impressions. Sometimes their kids like it more and their attention span is just short. When it stops, we have another drink. Manny return voluntarilly. Than I rinse and repeat. During a second tour, they have more questions. Sometimes they have started something in their own garden, and they share their experience. The second time we don't finish the tour either. Only long term revisitors who are becoming permies themselves (whether they know it or not), can finish the tour, and that takes a long time, though it is a small garden.
I always start where the people are. I have a friend who had no idea that radishes grow underground. Therefore her young daughter did not harvest them and they started developing seedpots. She showed me a picture of what she thought was a bean plant. I tried not to laugh and explained about radishes growing underground. I told here about saving the seeds and try again next year. She could not believe it worked that way. She shared the seeds (from only one plant) with her family and friends. Even her father, who lives in an elderly home, started a few seeds in a pot. Next year, during a party at her house, a lot of people told me about the magic of growing a radish from seed. "...and they grow underground! ... and if you don't harvest the radish, it grows new seeds!" They have truely experienced a miracle that they think worth sharing, and continue to do so until this day.
I always think this is a shocking, but funny anekdote. I regularly share it with all kind of people. A lot of people are missing my point: they had no idea that radishes are growing underground... All those people are far away from being a permie, but some of them have visited my garden (where they looked at a tomato growing on a plant. "... it is green before it becomes red!? And it grows from a flower!?"). Some of them visited my garden more than once. Some started growing something themselves, some just feel happy there. Sometimes I think this is my most succesful gardening achievement: reaching such a large group of completely disconnected people and just reconnect them with nature.