A recent past weekend, I took on a project that scared me. I ran electric wire to one side of our garage and installed two lights, two switches, and an outlet.
I learned more through this little project than I thought I would. That is funny to me because it means that I was ignorant about how much I was ignorant.
I learned to appreciate the wonderful role of a fuse. At first it was frustrating when it blew and everything went dark, then I realized that I had wired a simple switch incorrectly. I put the positive on one terminal and negative on the other. A quick Google image search showed me my error immediately. I created an uninterrupted loop, that would have resulted in overheated wire. The fuse stopped that dangerous progress.
I also learned more about drilling through concrete. I learned why outlet boxes come in so many depths. A small project, just to add light to the front yard, taught me so much.