Hello, does anyone have any comments on this tutorial?
I wish that it was a way to automatically generate the bones and their placement, because this process is tedious.
Welcome to rigging 
It’s all tedious.
Jokes aside, yeah, this is about as good as it gets. Skirts and dresses are a massive pain to rig, there’s a reason you don’t see a lot of them in most video games.
One possible alternative method:
Fortunately the dress is low poly and somewhat simple. I am working on this character:
When it’s done I will try to export it for chillVR/Vrchat because I think that these platforms needs more creatures from folklore.