Per here, the Special:CreateAccount page at English Wikipedia should have a field underneath the userlogin-yourname-ph field (where the user types in the username they wish to have) where short, essential instructions about how to choose a good username can be placed, rather than having them at the very top of the page as done presently. This field can be structured the same as the existing createacct-useuniquepass field. Could you please create it? Thanks!
Example mockup: