I'd like to point out, apropos of something I saw this weekend, that the suggestion to write an #introduction post assumes that new users *want* to be found.
Some people are here because they've had bad experiences on other social media sites--or even other instances--and would like to be quiet for a bit. It's OK to be a wallflower and watch from the shadows for a while until you feel comfortable. And you are in no way obligated to disclose more about yourself than you wish to.