First, change your browser. You have lots of choices. Stay away from Google and Bing. I know that Comcast is programmed in China. If you are using Comcast, they have your data. And your cable box is Chinese controlled. Consider using your own equipment. A router and modem is not expensive and its better than theirs. Try private windows. That is harder for them if they are watching your login. And then you could try a VPN. VPNs are good anyway.
This will never get you totally out of the woods. They can always see the address in the stream of your data going in and out. But it makes it much harder. And the effort may be too much for them. If you were Tucker they would make that effort. But you are a low importance target. So its more likely that all you need to do is make it hard.
One thing that is really important. Don’t sync your phone to your computer. Don’t use google very much. Don’t use Facebook or Twitter or Instagram if you can help it. Certainly you never want to login to these things. Don’t install Zoom, ever. And Wechat and TikTok are right out. These are among the worst. There are far more.
Just for starters, I’ve installed DuckDuckGo, which I’ve been meaning to do anyway. I’ll see if this stops now.