Singer Heavy Duty 4423 4 Threading & Winding a Bobbin

Complete newbie for a sewing machine. I have a singer 4423 and I am trying to wind the bobbin but nothing happens I tried to follow the instructions steps by step and

SINGER 4423 Review: The Heavy-Duty Hero of Sewing Machines?

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SINGER 4423 Heavy Duty Sewing Machine With Included Accessory Kit 90W High-Power 23 Kinds Of Multifunctional Desktop Sew Trolley - AliExpress

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