The winding method of sewing machines is generally similar, so I have learned one and understood everything else.
Slowly remove the empty wire wheel and take care of the spring and insertion rod.
Press and rotate the upper thread wheel inside the handwheel to eject it.
Pull out the thread rod on the sewing machine and place it on the thread shaft.
Put the empty wire shuttle on the winding spool and wind the thread end a few times.
Gently hold the thread hook with one hand and pull the thread parallel to the thread hook with your fingers.
Step down on the foot pedal to rotate the bobbin, and slowly adjust the angle of the thread with your fingers to wrap the bobbin around the thread.
Take off the wrapped bobbin, rotate the winding shaft inward and press, and then install the bobbin.