There are a few different ways to work with zippers – this is one of the easiest.
Zippers aren’t hard at all, but they have a reputation for being tricky so I’m going to ease you into it.
This is NOT the technique you’d use for most garment sewing – that’s “hiding” a zipper behind a seam and you can find that video here.
This video is sewing a visible zipper and it’s great for craft applications like pouches, bags, pillows, etc. And, like I said, it’s easy peasy. So find your zipper foot and sew along!
Oh – and if you’re looking for the embroidery pattern for those monsters in the top image, you can find that here. And the free patterned for the zippered pouch they become is here.