Welcome to the forum from Texas.
The only thing I could find was an instruction manual for a Dial N Sew Centennial Model. Don't know if that is what you have but you might find some info here that will help you. It's a free download & you can also flip through the pages on the site. Generally, it's the bobbin that is underneath & it needs to be filled with thread before you can start to sew.
https://archive.org/details/dialnsew...nbook/mode/2up