World's most AWKWARD snowboarding trip? I'M SO EMBARRED?

To answer your question, a good rule of thumb is shoulder width. I am not sure exactly what you mean by hard to turn left foot forward to right foot forward. But make sure your binding angles are okay. Secondly I can't help but wonder if your board is the right size for you or if the core is worn out on it, if its that old. So it could be a number of things.