For starters, bare minumum:

email - protonmail use aliases for public emails desktop OS - Debian browser - LibreWolf with minimal extensions PiHole on your home network to filter ads and tracers local app for many things - umbrel beind tor for your BTC node and electron and mempool phone - GrapheneOS compatible phone (newer pixels), You will get kick out of reboot sequence when it shows google logo and then "nope, I changed my mind, load Graphene" lol You will learn as you go, tons of stuff out there if you are willing to do some work