@sarsak
I don't think so. You can be very stable with skis even with no speed. Having both foot free give you more control.
While with snowboarding, you are always unstable, and you always need some speed, which can be tricky for a total beginner.
I don't remember much when I began skiing, as I was quite young, but when I switched to Snowboard I really had a hard time. But at least I was able to evaluate a slope and don't fear them (important as you need speed)