Stamping decals nail art: Advance stamping technique

I tried. It's been on my list for sooooo long to make stamping decals but the whole idea seems to be just quite long.
Here's my trial:

I m not too happy with this. It turned out crinkled and didn't seem to stick well. Yeah my nails kinda dried by the time I reached my ring finger. So I have a few edges poking out despite TC.

But on the positive I think the combo was nice. Don't you?

Have you tried decals? If so would you know why mine crinkled? Tell me.