Didn't go into much detail? That was a wealth of information- and an excellent starting point for me to begin understanding what all of it entails. It seems more intricate than putting together a harness, requiring more thought on the matter.
Note to self: Creative juices- now would be the time to start flowing!
Well, not much detail on why they were important symbols to me. Plenty of detail on what they mean. If you understand the distinction.
But yeah, I think the important thing is to come up with something that looks good, and
feels right. Not everyone has symbolism that is personally meaningful in the same sort of way. You can start with charges you want, or you can start with a meaning you want to convey and then research what charges represent those. Or you can just use something you think looks cool, or derives from a nickname.
Just be aware that if it's overly simplistic, like just a dragon on a single-color field, it's probably been done or is very close to someone else's. Anything with multiple charges has a much better chance of being unique. This uniqueness may not matter to you, of course, unless you get into a larger group like the SCA. That's why I took the time to register mine, so that whether I get more active with them or not, my uniqueness is protected there, and I can happily paint up shields and banners and display them proudly without anyone complaining.
The way the SCA does things is very close to European standards. For instance, any new CoA has to have at least two "points" of difference from any other registered arms. I think several things saved mine from having to undergo changes, because swords on Bends are very common, as are dragons. But the fact that I did the Bend in "sinister" (rare), the dragon is in a "couchant" position (also rare), and I combined them with an ankh (pretty uncommon), all worked to my favor.