Help with Korean form.

I recently purchased a Hwarang Korean bow and have been shooting with a thumb ring with my previous bows but would like to shoot the korean bow with Korean form. I still do not know how to properly make the bow twist, and have a slight concept of grip but I rarely get the bow to twist consistently. I notice that when everything goes right my arrow gains significant velocity and accuracy. I would love to hear any advice or knowledge you guys have to offer.