I did start out private but quickly realized because I have no followers I was sitting alone in the dark lol. So I sent out a public "hello world" -- by now it has probably passed the moon on its way to points unknown.
I've added 10 birdies to follow. One of them is chirping a bit of encouragement a few times a day, the others just bland promotional stuff. I'll stick with it for a while so I can get a fair assessment. I don't plan on chirping anything myself -- I have nothing to say!