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.

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.

Smooth