Earlier quoted context omitted.
Assuming you are very mechanically inclined but not particularly well versed to traditional construction, what does one do to learn more about this process?
Spend 3 months watching YouTube, you'll probably learn more tips than many contractors know. Then 3 months practicing small mock-ups - building forms, frames, stairs, windows, roofs, installing insulation, vapor barriers, sheeting, drywall. A fancy shed isn't a bad place to start. Plan on hiring a plumber, electrician, and HVAC specialist. Probably another 3-6 months to figure out all the paperwork.
The playlist currently has 126 videos. It's here: https://www.youtube.com/watch?v=AGCC-_Cuhhw&list=PLRZePj70B4...
My impression after watching most of it: It might be "easy" to build your own house once you are an experienced contractor. If that's not you, then it's going to be a second job, or even a third job (building and learning). You will need to hire and manage subcontractors - the kind of job the contractor does. If you like that sort of thing and that's how you want to spend your time, go for it. I personally think that my time would be better spent finding a better job in tech and getting a promotion, so I can hire a professional to do all that.