Setup VPN tp-link Archer AX18 router and link to TV

I need someone to walk me through, on the phone, setting up my router and connecting it to my Tishiba Freely TV.

I'm close but not there. Freely won't connect on WiFi it does work with ethernet. When connected I get error messages so I guess it's recognising the router but not the UK VPN. I'm using Nordvpn and the router was one they recommended. I want wireless connection and UK Freely TV here in France.