Step,

1. Install linuxmint
2. Change you’re Browser to a privacy focused and open source one like librewolf
3. Change your search engine to a privacy focused one like searxng
4. Remove unnecessary apps from your phone. Lock it down with firewall like rethink. Change your DNS Nextdns is recommended
5. If possible move to a private custom ROM like graphenOS
6. Use email aliases
7. Don’t use real identity. Start deleting everything related to you.
8. Don’t use cloud ai bullshit
9. Delete your Google, Microsoft, Facebook accounts one by one.
10. Maintain online hygiene. Don’t sign up for everything you see.
11. Move to open source software

I use arch btw