Same as Copperhead - we used to show our best horse in hand from yearlings and all my horses are taught to walk and trot in hand before they lunge so they already know the verbal commands and understand the 'clucking' noise - really important that you use them
Forget about trying to move in from the lunge - that's just going to confuse him (which it is) and unless you are experienced with drive lining or have someone to help you I would steer well away from that too
You should ideally be at a point around your horses shoulder - never get tempted to drag from in front - horses usually dislike being dragged and their reaction is to pull backwards and throw their head up.
I also use a long schooling whip to give a little tap behind the horses girth area to encourage forward movement. It will be a bit 'raggy' to start with but with practice gets better all the time. The horse should eventually just be 'looking' at you for your body cues and walk/trot/ halt when you do on a loose lead line with no verbal commands at all
This is one of those learning things that I use treats as a reward for