I'm a self-taught programmer. I've learnt a lot from various sources but I've never had a high-level IT instruction. Many technical tutorials handle learning with a high level of detail, but what I often found lacking is a simple, common-worded explanation and a progressive increment in detail. You cannot do that with large topics or you risk forgiving what you've seen in the last step.
This, ultimately, is my way of learning and I hope to help some of the people who stumble upon these pages.
Start from Level 0: many concepts and words may appear too generic or improper, but layer by layer we'll add a generic reference to code, that will become real-life examples, with progressively higher detail in terminology and methodology.
I try to keep each level as dry as possible, lighthearted and trying to talk about the topic always from A to Z.
Feel free to start diving from which level you want: if all is clear dive deeper, if not go up one level. And if the final detail is not enough, feel free to ping me: I'll try my best to go deeper!