I did o.k., but after a few years I still hadn't gotten that "flow".
After a few years of skiing, I tried boarding and got "flow" the second day when there was 12 inches of fresh pow, even though I still sucked at it.
Immediately switched and haven't looked back. Several years later, it dawned on me that waterskiing is done on a single ski, so it is much closer to snowboarding. Your feet are just at a different angle. Seems obvious in hindsight.