Hi,
I am not from the Netherlands, sorry but I can try to point you in the right direction and give you some reading.
To ensure the card you want to clone is “clone-able” could you scan it with the app NXP Tag Info and post the info; specifically under the heading “IC Type”?
Does the source card have a 7 byte or 4 byte UID?
Does it need a hardnested attack to gain the keys?
There are already some pretty good guides on the forum and externally that already cover this.
Here is a video made by Amal detailing the exact thing.
Please read this post by Amal about the magic Mifare chips.
I have only used a proxmark for this type of task so take what I say with some salt since youre using an ACR122U.