Snowboarding absolutely is as fun as it looks, but don't underestimate how much it's going to hurt the day after. I've gone nearly a dozen times and I still end up bruised by the end of the day. Admittedly, I'm a bit clumsier than most, but I've never collided with another human being at least. Also, I was surprised that the article didn't mention the one aspect that I actually found way harder than anything else to…
Taught myself riding at an adult age with a lot of pain and preservance. In my experience the hardest thing to do on a board is standing still or going really fast straight. Regarding your problem just try and go back directly instead of standing on your heals. And then do it slower and slower till you can control the action.
Carving is actually riding faster than riding flat and straight.