I'm not particularly skilled, either, and at 62 my balance probably isn't what it used to be, but I didn't have much trouble getting used to them. I do have friends who are much better riders who hate them.
Even if the first try doesn't go well, give it at least 3 or 4 more tries before you write them off. For me, getting started was the hardest part. Once you get going, faster is better. It's MUCH harder to ride slow. As I said before, try it in a narrow hallway where you can stick out an elbow if you need to- much easier if you can keep both hands on the bars.