I learned a lot from family and friends over the years... One of my friends is a finishing carpenter, and my uncle and cousin have been journeymen framers for years!!
So lots of helping and learning along the way!! Everything else is self taught trial and error!! Lol!!
One thing I do have is a good imagination to help figure things out, and google/youtube sure helps!!
Looking back, I have been pretty lucky to have some great people around me, especially
when it comes to my reno... My Uncle and Cousin built the whole second floor, my Dad and I just helped and tried not to slow them down!! They wouldn't take any money, but I got my cousin a bunch of snap on tools and promo stuff!!
My best bud helped me weather shield and shingle the roof, I only had to pay for his helpers labor, so 300 bucks to shingle the roof is pretty good... He is also going to do the siding, soffit, facia, and capping this spring... That will only cost materials...
Like I said before, I have pro electricians and hvac guys, they don't work for free though, lol!! I will be hiring a pro mudder too, willing to pay for that too...