If I had learned how to fix my own heating and cooling system, I would have been able to save a lot of money over the years.
Not only that, I would also have a good sense of accomplishment by fixing my own air conditioner or heater.
I realize that not everyone is cut out to be able to install and repair air conditioning, but I think if I had learned when I was younger, I would have been able to do it. I may not have decided to be an HVAC technician for my main source of income, but I also could have used it as a little side Hustle. between fixing my own HVAC when it has broken down through the years and also repairing the HVAC system other people as a Moonlighting job really could have helped me financially. The guy that came to fix my air conditioner not too long ago had to climb up into the attic to deal with whatever the problem was. Ironically the guy who fixes the AC has to practically pass out from heat stroke because of the places he has to go and crawl into. At my other house, when I needed air conditioning assistance, sometimes they had to go under the crawl space of the house. That, too, is very hot, and it may have even had the skeletons of old disgusting animals that died under there as well. Not to mention very living spiders! My point is, being the AC guy is not all glamorous and everything, but it pays a good living and it also can save you money if you can repair your own heating and cooling system.