I definitely think it is a good idea. I just started to caponize this past spring/summer. I did lose my first bird, because I nicked the vena cava. It bled out very quickly, and was gone within 30 seconds. I haven't lost any since. I have had slips, but they grow out bigger before they start crowing, etc, and the meat is better than a young rooster and more of it. I haven't tried a capon yet, but am growing some out now. I have one that is 29 weeks old, and weighs 9 pounds(the one in my avatar). I have another weighing in at 8 pounds, and others that I haven't weighed yet.
There is a learning curve, and if you are only partially successful to begin with, you will still have a bird to eat. Your success rate will get better as time goes on. If you can find a mentor who will help you that will help with the anxiety or get a buddy and learn together.
I think I may start that this spring/summer. There's plenty of time between now and then to research and study for the "test". Maybe I'll only have 1 or 2 die on me. Either way still got chicken 'n dumplins at the end of the day.