opsec is more about behaviour than just "install X, use Y"
here are easy tips that make a huge difference in your opsec:
- ditch Google/Apple/Microsoft/Amazon completely from your life
- get a grapheneOS phone
- use opensource apps only
- always use a VPN, with killswitch enabled
- delete all normie social media
- never give PI to anyone or any website
- pay with cash whenever you can
- use nyms and change them regularly
- if you need a phone number, change it regularly