You can do all the privacy measures in the world, but if the people you talk to are using spyware then it's all out the window. (literally Windows, get it?)
This video breaks down some of the basic reasons to switch to Linux so you can convince your friends: https://video.simplifiedprivacy.com/why-linux-beats-windows/
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Amen, brother!
Leading by example is the proper way forward.
Most people hate to be told that they should be using X because it is so much better than Y or Z.
Belittling the other person's preferences is a sure way to lose their interest.