will help you to finish quickly.
select your mesh → click the icon
It will bind on joints which it has this tag - attribute name is a skin_joint.
select your mesh → click the icon
It will add influences when you turn off.
select your mesh → click the icon
It will bind on joints which it has this tag - attribute name is a skin_joint.
select your mesh → click the icon
It will add influences when you turn off.