Sure it makes a difference. The less information you leak to the outside world, the less is known about what makes you tick. All information that gets to the internet is potentially collected and kept forever for whatever purpose.
With more privacy-respecting browsers, Privacy Badger and uBlock Origin adblocker you’ll leak way less data. Going through all your privacy-related settings in all of your apps and optimize them. Turn off settings that send data to external services (text prediction service, correct-as-you-type, auto-suggest, search suggestions, translation service, etc.) also very important. Prefer website above app versions.
You will lose some usability, but you’ll gain privacy protection. Now it is costing you a lot of time to check all of this out and get used to different way of working, but after a while you’ll get used to it and when installing a new app you’ll check privacy settings as a habit. It will not be that bad then
And you will be able to teach others, having gained valuable skills.
Regarding your phone: An Android device, especially Samsung is worst for your privacy. You may consider an Apple phone, or - for more advanced users - an Android alternative OS (like LineageOS or e.foundation).