Timing of orthodontic treatment

When is the best time for orthodontic treatment?

The younger, the better

There are many rumors that things are better after childbirth ㅜ

Is there a better time to get orthodontic treatment?

If that's not the case, I ask because I want to do it as quickly as possible anyway.

I've seen people feel malocclusion after orthodontic treatment, but is that considered medical malpractice? It's probably not a common occurrence, right?

Does the correction effect differ between visible metal braces and those placed discreetly inside the mouth?

Is it just a difference in duration? Or is it only a difference in appearance?