Actually I haven't tried that one, but Betty Adorno is great at it-- you might want to shoot her a message. She helped me answer someone's question about transitions from that move once so I know she'd like to help!
Then I've got some tips for you, it is one of thos typical moves that once you got it down, you don't understand why it was so difficult in the first place:
1. don't give up! It took me a very long time to learn this! It seems impossible first but the longer you practice the better it goes
2. start with light hoops, not too big (smaller than 40''), but not too small either, (the mini's on my picture are a bit too small to start with)
3. Practice with hooping around your arms first, because that's the motion you have to get used to the most
4. When your hooping with both hoops, the first times your arm will probably automatically stop moving: focus on the movement of your arm.
You'll certainly get a lot of bruises from practicing this, but once you got it down, it is very fun to do.
I am not sure if I can do it because I haven't actually tried yet, but I heard someone describe how to do it once (can't remeber who). They said that you should have one on your wrist and one in your hand. The one on the wrist is the one you should focus on doing because the one in the hand kinda come naturally after that. I hope that helps some. Think I'll go try it right now actually.