I use a privacy focussed email provider (mailbox.org), Brave Browser and sometimes the Tor Browser.

Social media is a Problem (i also consider github and hn as social media) i did not fully solve yet but at least no google, meta, X or related.

Linux and graphene OS, encrypted self-hosted services (immich, navidrome, audiobookshelf, pi-hole, gotifY,...) with wireguard instead of cloud services.

Open source apps where possible...

  Obtainium
  OrganicMaps
  PDF Doc Scanner
  K9mail
  OpenCamera
  Immich
  Audiobookshelf
  Fossify file manager

Some free ones

  Substreamer
  Magic Earth
  Koreader

Improving in this is one of my hobbies but i don't See it too critical. Trying my best with acceptable effort is enough :-) Pareto rule...