Network security is a field that industry professionals typically study and practice for years before achieving competency. You are unlikely to find a single nugget of information that teaches you everything you seek.

Instead of worrying about what the world already knows about your internet usage, take some actionable steps towards making your router STFU (shut the f*** up).

People on the internet (and those running the internet) only know what your router tells them. They won't know very much if you make your router STFU.

Build your own router/firewall server or flash a store-bought one with open source firmware like OpenWRT or pfSense. This firmware will surface new configuration options that you can use to make your router STFU.

For example, you can make your router encrypt 100% of traffic and send it to an anonymous offshore no-KYC server with a Wiregaurd tunnel. The traffic is decrypted on the server and forwarded to the next hop. Even tor traffic will go this route, encrypted again so it no longer appears like tor traffic.

With a setup like this, go ahead and run dozens of services that are very chatty. Tor relays, bitcoin nodes, webservers, torrent seeders. Make it very noisy to distinguish patterns among the already encrypted data.

The offshore server knows very little about you because it was anonymous signup and paid with bitcoin. They just know your account number, and they know every request you make on clearnet. But the hope is that the offshore server doesn't have an obligation to share data with foreign government agencies.

Hopefully, only your ISP is forced to share data. And all they know is how many GBs of encrypted packets you send/receive to the offshore server.

You don't have to jump straight into this idealized setup. In fact, its probably impossible to set this up in a weekend unless you're already a professional.

Just try to make your router STFU a little bit more every week. Study the dark art of Network Security and practice building your own defensive networks at home.

Recommend this book: https://inteltechniques.com/book7d.html

Specifically the section on firewalls.