This is my resource list. It's a work in progress, so feel free to make any aportations by using the form or by contacting me via email.
Links
Web I found for basic electronic projects and tutorials on the social media app that shall not be named:
https://www.circuitbasics.com
An Intensive Introduction to Cryptography - Harvard Lecture Notes:
https://intensecrypto.org/public/index.html
Books
Book about scientific writing (ESP):
Manual de Redacción Científica - José A. Mari Mut