Ideally you want your switch riding to be at about 30% or more of your regular riding so that you are comfortable with landing if you are going to spin, rotate etc.
But you can certainly learn straight airs, grabs 50 50s on boxes without riding switch.
What you will find though by trying to ride switch on those not so good snow days or off days or flat sections of the hill is that your riding will improve considerably on your preferred side
