Ha ha, you should start that self-help group. My sister would join it, she's also pretty bad at judging distances for those moving platforms. She isn't very good at hitting the moving question mark blocks either, sometimes I have to step in and hit it or else we'll be there for a while...
Anyways, I never thought of an introduction that way before, that's an interesting comparison. Though I don't think it is necessary to say anything about yourself, you could just pop in and say "Hi!" if you wanted, or skip the whole thing and go post in the topics which pique your interest. I certainly wouldn't consider that rude, and I doubt anybody else would, either.