Embed Google Tracking Code on WordPress Site

I need assistance embedding Google tracking code on my WordPress site to enable effective tracking and reporting for analytics and/or advertising purposes. The code may involve Google Analytics (GA4), Google Ads Conversion Tracking, or Google Tag Manager (GTM).

I have a meeting with Google Ads on Friday 24th @ 10.30am - 11.15am GMT - I have included a portion of their e-mail to me.

I have already Tag manager etc set up. The Google site kit installed and running on the Wordpress site. I have analytics set up.

I can access the google ads account - it's the Wordpress side of things I need help with.

This is the portion of their email which is relevant -
"Ensure the following points of contact with required access join the call, as the implementation service will not be possible without them: (1) representative with administrative access to the source code of your website (FTP/Admin panel access); (2) Google Ads manager with access to the Google Ads Account.

Create a backup of your website before making any changes on the call."