For me, I ride switch very often. I like to ride with my stance angles the same (+18,-18). I know people who ride switch more like yourself (+14,-12), so it is possible.
The reality of switch for most people is that you have to consider it starting over, and assume you can't actually ride a snowboard. Otherwise people try and ride switch on blues or blacks and wonder why they crash so much. Head back to the bunny hills (Suck it up, if you think you are too good for greens).
When riding switch, people usually have the same problems they used to:
- Riding in the back seat which means too much weight on the back foot
- Riding open, not keeping your shoulders and body in general in line with the board.
- Riding too tall, not keeping your knees, ankles slightly bent with the back up straight.
So, in summary head back to the greens and try out some novice turns switch. Trying to focus on keeping the weight mostly balanced, with a little extra on the front foot.