So maybe start with small things that actually improve the experience. Instead of asking "do you want to get away from trackers" ask "do you never want to see ads in your life ever again". Then show them how to install an ad blocker.

Don't try to talk about everything at once. You also don't try to teach advanced chemistry someone who has absolutely no idea and interest in Chemistry. You have to teach them small steps at a time and make it sound intresting and easy.

And it's not easy when you tell them "it's easy. You just have to install this, this and this and have to change your whole habit of using your devices by using a different browser and learn a different client for apps. Oh, and most of them aren't available on the play store and give a warning when you want to install them."

You have to make them care about their data, you have to make them care about what you tell them. And that's the hard part