Asked questions when I saw things being done. Thought about things and realized that most stuff needs only a few things. First and foremost is confidence, that can be built. Second is knowledge, you may never have scaled a mountain...yet if you see a video of it, you can approximate what it takes to move your hands/legs and get up there. Third...right sizing. That's correct, many people look at something as a whole, not as pieces. Almost no project is a one thing and done, there are many little components that make it work. Look at a spark plug replacement as an example, step 1, step 2.. many small steps lead you to a successfully running engine. If you've gathered the information on the steps and understand that most things in life come apart by turning them counter clockwise, and go together by turning clockwise. Then there's simply a matter of learning how tight and the little pieces in between.
Willingness to learn is a huge thing. You have come here asking us how we learned. Well.. we did so by asking, watching, trying (in some cases breaking stuff and telling each other about it). Feel free to pick our brains, ask things that may sound silly or end up being pretty silly in the end. It's all good.