Since there is nothing newsworthy to post here, apparently, I’d like to make people aware that many free educational courses are offered on Coursera.org. Many but by no means all are designed to help people efficiently develop computer knowledge and skills. More complex content can be found in the Cybersecurity and Secure Networks courses.
Preparatory study of Discrete Mathematics and Number Theory May be useful for that one, but many courses require no specific background knowledge, other than basic computer use familiarity.