Unfortunately counties/states are going more and more online, so for example county assessor info is considered public and searchable by anyone online. These sites are actively searching that info when you do a search on their site.
Browsers give away a lot of info by default. You can use add-ons to hide some info, use a VPN to hide your location, or go deeper with Tor. Phones are even worse, not only do apps ask for access to data they don't need simply to sell it, many out there steal data without asking. For example Tik Tok was recently sued for compiling facial recognition, which is widely used in China for their "social credit score" system. Lots of technology tools are being created in recent years, and they will all quickly be leveraged by bad guys as well as good.
My credit card has all my behavior info based on typical purchases, and when I take a trip to a new place I have to let them know in advance or risk purchases being blocked. And unless I remember every year to submit a request to every card and company to deny access to my purchase data to "affiliates", all that info is sold and resold.
Unless you're willing to pull out some cash to make in-person purchases and avoid online transactions at all costs, use a browser like Tor and a VPN on a secure operating system, pass on the smartphone and purchasing property you will always have some of your info online.