The ACF is not intended to teach fine openness. Many sites already talk about it well enough. For those who wish to learn here is a collection of useful links and books to begin lockpicking.
To learn it takes a minimum of knowledge of the mechanisms, for this 2 PDFs to download or read are at your disposal, first of all the abstract of crocheting quite sufficient, as well as, less contemporary but also interesting, the: “MIT”.
Books to begin lockpicking
Some books are available online but for those who prefer paper we recommend “the locksmith’s manual volume 1 new edition” quite affordable and ideal to understand the different techniques available to you:
If you think another site could be added let us know. Thank you.