A while back I looked briefly into what it would take to be an electrician, and it seemed like there was quite a lot to know. I wonder how soon you get to the stage where you could wire up a shed like this with full confidence that you've done everything to code.

From there, how many other subjects do you have to get right? I learned how to swing a hammer as a kid but I wouldn't know jack about designing load bearing structures, weather proofing, foundations, hanging windows and doors, etc — let alone plumbing, HVAC, etc.