How do you smooth path lines?

[adwhitewolf]

Hi all. I'm using gimp 2.10.34 (version 2) on an iMac. I am trying to create a filled in path that has smooth, curved lines. Specifically the collar on a T-shirt. I draw my path, and then fill it with the desired color. But when viewed against a contrasting background, you can see how pixelated it is. The image size is 1024x1024 I just follow a path of the collar using the paths tool, then I use the paint bucket to fill it in. 
 Is there a quick and simple way to smooth out the edge of the collar?