I have tried to follow these instructions to set up a whole WiFi VPN

https://www.tp-link.com/hk/support/faq/3642/

Unfortunately those instructions are for an old version of the app, so following it is not fully possible, but I have tried a few workarounds and get no successful result.

I am not sure what I am trying is even possible - that is, to use my Deco XE75's to beam out a specific county VPN using my NORD VPN account.  I have used 'tokens' to try and connect my NORD to the XE75 (via using the latest upgrade of the Deco App current as of today on my Samsung S23 phone, also with latest app/firmware upgrade) and get general error messages despite my trying multiple iterations.

I think firstly I would like to know if what I am trying to achieve is even possible (spreading a VPN via a specific country to every device in my home using my router - no need to ask why I want that, I would just like to try to achieve that);  then if that is possible, can I use my existing paid NORD account to achieve it - or do I need another method.  And if I want to change the country of the VPN for whatever reason, is that possible.

Any help would be gratefully accepted.

Thanks in advance