No comment as to whether this should or should not have become policy (in some form), but I just wanted to clarify that m:Don't be a dick is not and never has been an official or semi-official policy.  It would more accurately be described as an essay.  The Wikipedia page WP:DICK is now a soft redirect the meta page, but prior to that, there was a contentious debate as to whether or not the page should be deleted, as evidenced in the page history.   That said, welcome to Wikipedia, and I too hope you will continue to make positive contributions and enjoy your stay here.