First place the thread spool on the spool holder and secure it with the spool cap. Bring the thread to the left and snap it into the thread guide. Wind the thread clockwise around the bobbin tension discs. (Bring the thread to the right side of the discs and and then around the discs. Bring the thread to the right and then insert the end of the thread into the hole in the bobbin. Make sure that the hole is facing up. Place the bobbin on the bobbin spindle and push the spindle to the right. Hold onto the thread that is above the bobbin and step on the foot pedal to start winding the bobbin. When the bobbin is full enough, stop pressing the foot pedal (or wait for the machine to stop winding the bobbin). Cut the thread and move the spindle to the left. Remove the bobbin from the spindle.
Many Singer sewing machine manuals are available from their support page: https://www.singer.com/support
. The current link to the 4411 Heavy Duty sewing machine manual is https://www.singer.com/sites/default/files/product_manual/SINGER%204411%20Heavy%20Duty%20Sewing%20Machine.pdf
. The directions and pictures for winding a bobbin are on page 12 (page 19 of the PDF).
I hope this helps.