Asking someone to post an introduction is off-putting. Like when a new job makes you publicly introduce and say a “fun fact” about yourself. No one wants to do that, no one (but you) would be interested in reading it. I would not want to be on here if I thought that an awkward introduction was expected of me or considered valuable content. Maybe don’t come on so strong? Just a “welcome, glad you’re here!” is all you need.