will help you to finish quickly.

Open

bind a skin

Primary skin joint.
early stage for skinning, you only start with Primary.

Open

If you have this attribute in joint,

select your mesh → click the icon (No need to select any joint if you added the attribute)

It will bind on joints which it has this tag - attribute name is a skin_joint.

Open

add joints

Secondary skin joint.
add joints for extra influences.

For example,
Ribbon joints, Extra joints to tweak shape of assets

Open

Turned off the attribute

select your mesh → click the icon (No need to select any joint if you added the attribute)

It will add influences when you turn off.

Open

Smooth

Open

Before smoothing weights,
This set value as 1.0 will calculate more accuracy.