One direction you are spinning to connect with the earth, the other to source.
I love whirling, have not done it with dervishes, my understanding is that some are very protective and insist you do it correctly. (some bare foot nail in the floor spinning around it with your toes thing) Me, I started whirling our labyrinth on a whim, and now whirl it all the way in, hang in the center whirling till I compelled to whirl out, whirl all the way back out, and then keep whirling for a while until I feel the need to stop. I've never done it with others, I feel group whirling is a whole nother dimension and will be easier to continue...currently I'm just under 15 minutes max.
Now if you can find a place to
dance, this is an incredible interfaith sufi experience.
The International Network for The Dances of Universal Peace
I honor your exploration of the path of the Sufi, I feel they are brothers of Kabalists and New Thought Christians.