What is the opinion of Reddit about the
The Insider’s Tell-All Handbook on Weight-Training Technique?

Introversion has nothing to do with that fear. You will indeed need to face your fear though.

Or…

-If you indeed have acces to a powerrack , you can initially set the safetypins to the end of the range of motion of BP and Squat. That will serve as a spotter. You can look for a pdf for this book on how to do it: https://www.amazon.com/Insiders-Tell-All-Handbook-Weight-Training-Technique/dp/9963616097