A long time ago (pre-internet) I heard a normal person can learn to juggle in 1 day. It took me 2 days, but I learned to juggle 3 balls. But soon I realized what you said, the need for a consistent toss. Not sure of the reason, but I always make some errors with physical movements, they are never perfect. Even with typing, no matter how much I exercise, I cannot get bellow ~3% errors. Wondering if this is some kind of genetic effect, and how many ppl have similar issues.
I, too, make unpreventable physical errors all the friggin time.
For instance, I attempted to upvote your comment but initially downvoted it. Sigh.
I haven’t tried juggling for decades but I did manage to teach myself basic three-ball juggling when I was at university (any excuse to avoid revising!)
I think it took me a couple of weeks though. I’m a bit malcoordinated for that sort of thing in general. I think you’re right that there’s some sort of natural aptitude that not everybody has. Fortunately basic juggling is just about easy enough that almost any idiot can do it.