Hey Aaron, what's probably happening is you are leaning too far back. If its your back hip that's starting to hurt, that may be the problem. Try to distribute your weight almost evenly on the board, I know people say 70 rear, 30 front, but I personally have most of my weight on my front foot when I'm just riding. If your hip is still hurting I would play with binding position some.
As for cutting to the left, that would be toeside for you, its a bit tricky at first. You have to really pull the rope to your right hip and lean your hips over your toes, try to keep your body straight. Don't just bend over at your hips, you have to lean with your whole body. Put weight on your toes and try to tip your board up on its edge some, that will make you cut.
Hope this helps some. I will have tips on hs and ts edging up soon on Ladyboarder.com if you want to check them out. Its not just for ladies anymore.
If you have questions feel free to post them or email me. firstname.lastname@example.org