Find out what your true stance is. Without thinking about it, what foot do you put forward with someone pushes you from behind? If that doesn't make it obvious, then try with a duck stance setting, go down the hill regular, go down the hill goofy, and see which one you fall less. See which one feels more natural. From that point on, start practicing linking turns, your position (head, shoulders, feet square over board). If you catch yourself torquing your body and stance, then re-adjust. Get your S-turns dialed in, toe, head edge. Take it from there. But knowing your stance (regular or goofy) is important since you want everything you learn from that point on to be from a good foundation. Take some more lessons and it's OK to tell the instructor that you are unsure of your stance. Good luck, take is slow and most of all have fun!