I am happy that you are happy with your new Laptop
The screen foil is not for permanent usage, it is only for protection during production and transport. Getting it off can be a little tricky. Try to get hold of it in one of the corners and slowly pull off. I would advise to do this very slowly and if possible to do this with a good earth connection - pull on the foil with one hand while holding the metal case with the other or similar. What happens while pulling it off is that quite some electro static can build up and could discharge into the display.
If you can not get hold of the foil in the corners you may try to help with some duct tape. Press the duct tape to the foil near a corner while keeping the other end of the tape in your hand, then try to pull.
I managed to get hold of it with a fingernail in one of the corners… did not work in any corner but luckily there are four of them to try
Have fun with your new laptop!