The Wool Marketing Board runs courses all over the UK, but in the early summer and it teaches the techniques used by professional shearers... I did one a few years ago and decided at the end of it that I was too old for that kind of exercise.... also the testosterone in that shearing shed ... all the 18yo lads out-competing each other.
I would see if you can find someone locally who can teach you to hand clip, in the states a few people with small (and tame) flocks of Shetlands seem to be using a grooming stand and just clip the sheep standing up and tied at the head.