I would love to lunge him using clicker training, any ideas how i can start to teach him, i don't think he has the first clue bless him.
I use Parelli style 'games' & cues. Find that's another 'method' that I haven't come across a horse who didn't respond well to.... so long as you're willing to modify details depending on horse & situation, not just follow the 'games' like rules. I like to teach the horse the basics without a halter/rope first tho, which is back to front with what Parelli suggests. I find that lack of restraint - the horse being able to leave if he's unhappy/unmotivated to stay removes the feeling of pressure from him, and it definitely keeps me on my toes & makes me realise what I should/shouldn't do with that horse at that time.
How do I teach a horse to 'lunge'? I first teach them to come to me when I ask, with body language as well as voice. Then I teach them to yield to gentle pressure wherever I focus it. I start with steady, direct(eg fingertip) pressure, then teach them to yield to implied(bodylanguage) pressure. Eg. I point at/push on his shoulder, he will yield his forehand away from me. Point at his rump, he will yield that. As a part of target training, I teach the horse to target or move in the direction of my focus. I then point or focus at where I want him to go, so that he starts to just follow my gestures without extra pressure. Eg. I will first point out in front of me to get the horse to walk past me. If he doesn't, or doesn't understand, I make it clearer by using my other hand, with whip or rope if nec, to 'put some energy' out behind him, to 'push' him forward.
So, say he's facing me, up close. I initially might ask him to back up, then if I want him to go to the left, I point with my finger & left foot & focus where I want him to go, and 'push' with my right hand, just bodylanguage, but physically if nec. on his left(probably look a bit like a traffic cop when first teaching....
). Once he's facing side on to me, if necessary I'll wave my hand/rope/stick out behind him to get him moving or going quicker. To teach him to move around me in a circle, I'll push only a little, use my left hand to gesture that he should move around me, sort of half asking him into me, but not quite(clear as mud??). When I want him to stop, I might walk backwards, asking him in, or just put some energy out in front of him to get him to slow or stop where he is, on the circle. If he doesn't respond to the request to stop, or I want him to turn & keep going in the other direction, I'll direct some energy at his hind end to get that to yield away from me.