EFF friend Guy Kawasaki has written a book: Everybody Has Something to Hide: Why and How to Use Signal to Preserve Your Privacy, Security, and Well-Being. This guide is now available in Spanish and English as an ebook in the EPUB format that you can download here. Take a look and consider sharing it with anyone who you know who uses (or should use) Signal. 

And don’t forget: EFF has two short guides on using Signal on our Surveillance Self-Defense site. An intro How to Use Signal guide, and a guide on Managing Signal Groups. 

Everybody Has Something to Hide: Why and How to Use Signal to Preserve Your Privacy, Security, and Well-Being courtesy of Guy Kawasaki.