So much of this domain knowledge for repairs, etc. needs to be learned over time and actually doing the activity itself because there are many nuances and odd t

So much of this domain knowledge for repairs, etc. needs to be learned over time and actually doing the activity itself because there are many nuances and odd things builders have done for no apparent reason. It’s cheaper to do regular maintenance and repairs rather than whole replacements. If this sounds like software development that’s why the analogy of an app and a house are so commonly used. That being said, research safety elements of owning a home, this is usually where gas, electricity and water come into or out of your house. I mean all the gases, not just natural/fuel. Air is a gas and a blocked dryer vent is a common cause of house fires. Carbon monoxide can be lethal, have detectors and change their batteries. You probably like computers, research some safety stuff about circuits you’ll be powering them from and GFCI and how things may fail. Next after human safety would be knowing what to do for major mechanical system failures to prevent them from compounding. For example if you live in a cold climate, how to shutoff water and drain pipes if your heat goes out (so while you are at a warm nearby hotel waiting for a HVAC repair your pipes don’t burst). Knowing about general safety stuff and how to turn things off is a great start. Beyond that you can just pay someone else for nearly anything that comes up. Insured/bonded and licensed trades people from medium sized companies are a good place to start. Getting an astronomical quote to connect a couple sinks to existing PVC pipes might motivate someone to DIY it from a home center. When you’re at the home center, know that you will, without a doubt, be making multiple trips because you don’t know shit, so when you have a thought like “I think this is the right fitting” buy 1 size larger and 1 size smaller and just return the unused ones on your next visit.