By the way
Are you using rope/slider or hook?
if you're using waist harness with hooks, loose it as much as you can because tight harness with hook will limit you a lot when learning gybes. Any unbalance source will be a disaster for someone in the learning stages...
If your harness is rigid like Majestic, it'll not rotate very well neither if you wear it completly loose as the harness has an elliptical format.