So I just thought Id point out the reason for my design.
As you stated he was to be younger so I designed Merlin to be in his youth and not much of a mage at the time. The red outfit basically tells the world that though he is not an expert (yet) he will be one day and shall wear a blue robe(symbol of an expert).
He has only recently started growing his hair and beard out as this merlin has the flaw of being somewhat lazy to shave or cut his own hair. His staff is an old branch covered in spells he is trying to memorize and his amulet is of course magical. Hope this is acceptable