Differences Among Normal, Fakie, Switch, and Nollie Skateboarding Stances Explained

Regarding to your body. It's all a positioning thing! Here's a video that can help explain it. [VIDEO]

This [VIDEO] video goes over riding basics. Note that he just says lean to turn, you don't always have to lean; you can just apply pressure with your ankles at lower speeds, you lean to counteract the balance changes so you don't get thrown off. This [VIDEO] goes over stances. You ride with your dominant back foot, whatever foot feels more comfortable on the tail. When I first started, I stood on the board both ways

Actually, I think you're talking about riding fakie - not switch. This video [VIDEO] sums up the difference well. As to getting used to riding fakie, I started with going up the small and almost flat banks and only after getting really comfortable I tried to do the same with quarter pipes. Maybe that quarter pipe of yours is simply too steep for your current level of comfort?