Read and share "Free Software, Free Society" now.
Richard Stallman advised us about it long ago.
Thank god Plan9 got relicensed into GPL. 9front might not totally free, but it's a step in case GNU+Linux gets utterly broken.
And, yes, please, go try Trisquel (novice users), GUIX (experts) and Hyperbola (experts and protocol purists).
Avoid every Google, Amazon, Facebook, Apple, Netflix service with nonfree JS.
When I need to use my computer, I'm not thinking about someone else's crusade. I have crusades of my own to fail miserably at and I need all the help I can get from whatever products function best.