A VPN makes zero difference to tracking by Google or anyone else, it si also nothing to do with ads .In order to be able to use the site at all one has to accept the google tracking. Most people already have their browsers set to do so, so they never notice that it is there.There is no such thing as a non tracking browser, despite what many think or say. I've been making websites for 3 decades, coding for 5, I know what i'm doing on the internet.
Like I said; I mean to cause no offense, and if one can't code , google sites is one way to get a website on line.There are others that are free, but they are a bit more complex.Your site is fine, I appreciate that you run it to help people and that your motives are good

.I'm one of the people who doesn't visit any sites that require google to work, because it is such a faff to immediately afterwards deep clean our browsers and restart everything to get rid of the google tracking.It is certainly worth it that you bothered, and I'm not complaining, just making an observation. Many of us do not use google at all. We keep a separate machine for example to visit youtube, if there is no alternative. Any site which is hosted by google, or uses google fonts, or google analytics, or google adsense is not GDPR compliant. paranoid..No..but we value our privacy, which is why we have curtains, blinds and doors on the toilet at our houses, so that when visitors come, they have privacy and are not spied upon by the house builders. Not everyone feels this way, many would trade "free" for privacy.
Fine, but it does restrict your audience to those who agree to trade their privacy for access.
Now..Back to Hegner..
One last thing, google have a nasty habit of shutting their services with little or no warning, it happened to Google groups, and many other things that they ran, be watchful, because if they close the hosting service ( because it is not allowing them to track as many people as they thought, or whatever reason ) you'll lose your site..always keep an up to date complete back up of your site on your own computer.