How to stop Google Play Services from connecting to internet? To prevent Google from misusing it to spy on me (non-modified android, no root)

I wanted to reduce the amount of thing that Google knows about myself, because after reading several articles about what data that Google collect by default in android, I feel terrified. Because it is like no matter where I go, there is a creep behind my back that keeps on following me, watching me 24/7, like a drunk weirdo on the street that looks at me with scary eye and keeps on insisting to follow me (where in this case, the creep is Google). While trying to reduce the amount of data that google can collect on my phone (I have uninstalled or disabled all google app, including google play store, except google play services) , there is a severe roadblock that I encountered and don't know how to solve. One of the problem is that **I don't know how to keep google play services enabled while also preventing it from connecting to internet to stop google from misusing it to collect data in my phone**. I can disable it, but many app on my phone (such as WhatsApp) either breaks or work incorrectly when google play services is disabled. The most notable problem is that WhatsApp stop working in the background when google play services is disabled, that means I wont receive call and messages unless WhatsApp is opened in my screen (I have tried everything to prevent it from stop working in the background, none worked). To keep it simple, this is what I want to achieve: **I want google play services to remain enabled and all apps that use google play services able to connect to internet, while at the same time I don't want to allow google play services to connect to the internet**. In other word, I need some kind of firewall that allows all app, except google play services, from connecting to the internet. Android does not have firewall by default, and I tried to use firewall for non-rooted device such as NetGuard. To my surprise, google play services didn't show up in any of the firewall I tried, which means I cant use the firewall to block it. I really, really want to avoid rooting my phone because of serious security issues and the possibility of bricking my phone in the process. So, how to achieve what i want in non-rooted android phone?