Teach yourself electronics/understand electronic circuits

[Mike Watterson]

Agree with all that Amie.
Also if I hadn't been lazy I'd have suggested The Art of Electronics and the Radiotron Designers Handbook.
I recommend a 10" (minimum) tablet with a decent screen for old Electronics texts. There are some other good ones inc ancient RSGB and ARRL books. But I'd have to look them up.
The Art of Electronics & RDH would keep anyone busy for the next year anyway!
I only had, sometimes dubious, articles in PW, PE, WW and Television in the 1960s and early 1970s till I left school and went to Poly then BBC. Next door neighbour's son had and interest and was an Amateur, though we only met a couple of times as I was maybe 6 or 7 years younger. Some years later his mum gave me all his old Practical Electronics. All the older UK electronics / radio mags are available now as downloads. A big tablet is the best way to consume:
https://www.americanradiohistory.com/Pra...ronics.htm
also these start at the beginning and are often better:
https://www.americanradiohistory.com/Wir...gazine.htm
https://www.americanradiohistory.com/Exp...reless.htm

Also
https://www.americanradiohistory.com/Pra...gazine.htm
https://www.americanradiohistory.com/Television_IPC.htm

See the top menus "Technical & Engineering" for books and "United Kingdom & International" for magazines

The PDFs are scans with an OCR layer so searches sort of work.