Okay in your situation best option: use ADB and debloat as much as possible. I did a Samsung Galaxy s9 debloat already, it was the worst of all others, but I can share the app list. Be cautious, some uninstalls may break features like lockscreen camera or you get constant crash notifications.
Then get a NextDNS and setup samsung, facebook, microsoft and google tracker block lists. Switch your default DNS to this one.
Uninstall as much as possible, install as regular user apps when needed.
Your safety is totally okay, security never has to rely on online Accounts.