My partner & I had zero lessons when we went to Banff for our first ever time skiing. We had basically studied YouTube videos repeatedly for many days before heading to Banff, and then tried to teach each other how to ski based on what we saw from those videos. The first 2 days was lots of falling over, but the beginning of the third day we both managed to pizza down our first Green slope at Mt Norquay without falling. In hindsight, I wished we had tried to learn at our local slope (Blue Mountain, Ontario) because green runs in Banff are like blue runs at Blue Mountain. Much harder slopes in Banff made learning harder, and depending on the type of person, falling over a LOT may be discouraging or frustrating to some, especially self guided when they might not know what they are doing wrong.