Have you a farm near you where they have sheep, if so perhaps it would be worth asking them for help and also going along and getting a bit of experience.
I have been lucky in that the farm next to me have sheep ,the farmer does a lot of judging at shows, they have in fact become very good friends, so have been invaluable at shearing and worming time.
So my advice would be make friends with your nearest sheep farmer, they are always gratefull for an extra pair of hands at times.