I started my privacy journey last year. My gf at the time, was really into privacy and told me all about data collection and selling. I bushed it off, justifying it as the cost of a using a free platform, until I noticed that topics from our Discord convos would appear on my YouTube recommendations (or I Googled something similar, still creepy none the less). It was so oddly specific that I freaked me out and I almost immediately changed my search engine, browser, email, etc.