You can
but i would suggest you top coat first then stamp then top coat again.
You do have to be pretty confident when stamping onto the sticky layer else you Will take some.of the colour away if you get it wrong and need to take the stamp off and re do it. For tour first few goes stamp over the top coat and then.when your happy add another top coat that way you can take off and re do as mani times as you like without interfering with the sticky colour coat.
When you stamp be quick. Line the 1 side up with where you want it to be on the nail and the firmly, but quick (not super super quick as it needs a chance to transfer to the nail) roll the stamper and the design should transfer on the nail.
Have another go...over top coat. You Will soon pick it up, promise
xx