I start by getting one diabolo going in the loop.
I then hold the loop in my left hand, and insert my left elbow
into the loop. I then rotate my hand/elbow so they are level
(and the loop is basically a triangle).
I then take the other diabolo in my right hand and throw it
onto the string with some back spin. I then grab the loop with both
hands and get the shuffle going just as if I had hand sticks. Once it
is going I can switch to one hand.
Nothing fancy about it, but it gets you going.
H