I'm glad you found the stickers without a problem. They really are cute!
As for the applique job. This is what I do. I find an image, like say the outline of a Mickey head. I buy fusible web that has the paper backing. Then I lay the fusible web down over the image, paper side up. You can see through it, so then I take a pencil and trace the image. I cut the image out, roughly, not on the line, about a quarter of an inch away from the line, on the outside of it. I then fuse it to the fabric that I want to use. Then I cut it out on the line, it's easier to cut it out after you fuse it, to get a perfect shape. Then I iron the cut out, onto whatever I want to use it on. Then I iron on a piece of fusible interfacing on the back of the garment. So if I'm making a minnie tee, I put the fusible interfacing on the inside of the shirt, but making sure I cover the whole applique that's on the front, if that makes any sense. When you sew the applique on, it's nice to have the interfacing behind it. Then I use a low tension, applique stitch. On some machines it's called a satin stitch. If your stitch is adjustable, set it to a pretty low or high setting, whatever it takes to make your stitches right next to each other. Then you can adjust the width of your stitches. I use a thinner stitch to sew little things, like Spongebob's legs, shoes, etc. But like for his eyelashes, I use a wider stitch.
It does take practice, but not too much. The mickey heads are perfect, because they have curves, and these take a little bit of skill.
Good luck with your projects everyone.
I get to spend the day, following around a Labor and Delivery nurse tomorrow, so hopefully I can see a few precious babies being born.