I'm no hand shearing expert (that's what Mr F is for
) but if you're getting blisters your technique is wrong, or the fleece isn't ready for shearing, or both (dagging is different and horrible, needs dagging shears not shearing shears). The shears should glide through the 'rise' - you don't cut unless you can see what you're doing, you don't pull the fleece away from the skin, you keep the skin taught, you cover particularly vital bits with your hand. The exception is to open the neck wool, when you can't see, but you lead with your other hand, so you would cut yourself before you cut the sheep.
It's the electric shears which scare me - far more likely to cut the animal, as they go so close to the skin.
I can't point you at a you tube clip (ha) but I'm sure they're out there. It's the sort of thing you watch 20 times then you still can't remember which way you turn the sheep next.
There are folk on TAS who know far more about hand shearing than I do, so I'm sure they'll come along.