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…
* Stopping in locations that have a little extra slope makes standing back up easy. On the far edge of a cat-track, on top of a bump, etc.
* Keeping an eye on snow conditions. Soft snow or powder makes standing up on your heel edge difficult to impossible. If you arm just pushes straight down 2' into the snow, you aren't getting up that way. Sometimes when you fall in fresh snow, you'll need to refill a hole five times over to create a stable packed spot to push off of. Those are the good days :)
But basically, experienced riders will stand up in the appropriate way for the terrain, on toe or heel. From there, they'll hop a 180, make a turn, etc to get in the direction you want. Forcing yourself to stand up in the non-optimal direction is a lot of extra work.