I don't generally tell people about it, unless I am specifically asked or it needs to be mentioned for explanation of something (like where the heck am I going next April, for a week, all alone, for the first time across the ocean:)
I did tell a close friend some time ago, when I was excited about something (like getting my chart, or booking a flight to the gathering). She did not quite get it at first and moreover, initially she got even worried about me (as I found out later), so after that I tried to avoid telling her about it. It all depends on how much interest is shown. Actually at one point she said she would like to know what her overleaves are and those of her family. We even went over overleaves descriptions, both to attempt to validate mine, in the eyes of someone who knows me well, as well as having a go at figuring out hers.
I also told one of my relatives who is into this kind of stuff. She was mildly interested but I would not say it was for her.
I also told my teen children (one is Mature and one is Old soul). The Old one was definitely interested and I will eventually introduce her to it more. The Mature one said "I hope you are not paying for this"
But other than these very close people, and situations where someone literally wants to know, I don't tell people. I do not hide it either, it's pretty visible on my Facebook and I have no issue using my full name and photo on MT sites.