Spin wins! Like someone else said, start with a 3.5 footer or 4. You don't have to do anything creative to learn how to throw a 3.5-4 footer. Also, 3.5-4 means that is the radius of the net, really you get a 7-8' diameter with these nets.
I looked at a few demonstrations....This guy with the dragon tattoo throws just like me. This is how I would recommend throwing the net. By the way, he is throwing a 3.5-4' net, not a 6 footer.
Important notes to take from his demonstration:
The rope should be in small, tight loops. Long loops = snags and hang ups. The longer the loop on that rope the greater chance the cast net doesn't pay out right. Trust me.
Don't call the gulf of mexico the sea:*****: