Op let me start by stating the fact that your idea is a little vague. Now we already have a beginner and help board and there should not be any child board. Infact if there were what would you name it? Help for newbies?  Never forget the fact that not only newbies need help as many a time I have come across high ranked members of the likes of Pmalek notAthether , BlackHatCoiner, Phillipma1957 and many more ask for some help with some Bitcoin technicality related problems they have a hard time solving.

What you should understand Op is the fact that repeated topics by newbies especially introduction by newbies won't be stopped any time soon it's infact normal already. The best that could happen is that moderators would simply nuke posts that have very low quality and are useless.

A newbie who really wants to learn on the forum will simply find his way to the forum search button.