About laying, method is very simple, you should only get the hang.
Follow the instructions and everything will be fine.
1. Place glue on the paper and let it dry because the paper does require this treatment for expansion
and contraction of the paper.
2. When paper is dry, then only cut the paper to your desired measurements.
3. Now, glue the wall
4. Then glue the paper again but this time don't let it go dry
5. Paste the paper to the wall
6. Smooth out any air bubbles and excess glue. Note that the paper will stretch while you smooth out.
This is the opportunity to finalize the paper to your desired position.
7. Let paper dry and enjoy your new installation!
Here a video: