OMG. A friend recently told me about these soldering lessons on youtube, produced around 1980, and they're brilliant. Easily the best soldering course I have ever seen. Sure, some things have changed since then, but this info and these techniques are still the way to do it.
https://www.youtube.com/watch?v=vIT4ra6Mo0s&list=PL926EC0F1F93C1837