I'd like to be able to block internet access from my Android Pixel 4 cell phone. The ideal solution would prevent me from installing new apps onto my phone. I'd like to have a set of apps, so that I cannot add new apps, such as web browsers. I tried to set this up with Google Family Link, but it will still let you install apps that are rated E for everyone. I also tried this with AppBlock by blocking the app store, but I can download apps from play.google.com from my computer.
I would appreciate any assistance in reaching towards a solution. A potential solution could be one that requires an administrator to have a password to install apps would be acceptable, because I can give that password to someone who isn't me.
I'll note that one possible solution would be to stop internet access with my phone plan. But I'd still like to use the internet for apps like Uber, so that wouldn't work.
Thanks!