You want people to read your slides? Don't use a hard-to-read typeface.
Before building a "deck" for a presentation I suggest reading Tufte's "The Cognitive Style of Powerpoint" (https://www.inf.ed.ac.uk/teaching/courses/pi/2016_2017/phil/...)
"Two studies explore the extent to which this deeper processing engendered by disfluency interventions can lead to improved memory performance. Study 1 found that information in hard-to-read fonts was better remembered than easier to read information in a controlled laboratory setting."
https://medicalxpress.com/news/2011-06-hard-fonts-retention.....
On the other hand, the author of OPs “beginners’ guide” treats presentations like a brochure, which is in itself a beginners’ mistake. If you want to provide truly *excellent* advice to a beginner, point them to Guy Kawasaki’s 10/20/30 rule, you cannot really go wrong with that - yes, it is geared towards pitching for VCs but the approach makes sense regardless.
For a bit more of an in-depth approach, see this dude: https://www.presentationzen.com
Why? People have trained for decades on these templates, sitting through boring talk after boring talk, slowly learning how to extract as much info as they need from a glance.
The real meat of a talk is what the person is saying, and if the slides are too fancy, then people are forced to split focus.