I’ve been here on and off since 2006 but my confidence to post has never improved.
I find myself writing a reply, re reading to review it then thinking “no, no, you’re a gobshite. People will tut or laugh or argue with you etc” so I delete and just read other comments.
I’ve wanted to post a few threads too but always delete when I’ve composed them as I’m sure I just come across as an idiot.
In rl I’m riddled with anxiety but I can be full of banter and witty retorts and genuinely make people laugh or listen to my point of view but on MN I get the jitters! 
I kill threads all over the place too.
So am I just a weirdo with zero confidence or do other normally articulate and confident people shy away from commenting too?