Telling someone to improve their privacy is like telling them to eat healthier. They probably know on some level that they should do better, but it's breaking habits. Changing their...everything is a daunting task on top of everything they actually want to do.
It's a sales pitch, so I'd say sell them on one small lift at a time (Firefox, uBlock, DuckDuckGo) and build on them as they get comfortable with privacy control. Don't shame them, don't look down on them, don't be overly pushy.