I have a friend who is basically just somebody who likes to help in the community.
He volunteers at all sorts of events and he also teaches homeowners how to install ductless HVAC systems for free.
He is incredibly popular because of this because he has saved countless people a small fortune by skipping the professional HVAC installation. It was something I knew nothing about until I decided to go to one of his HVAC installation tutorials. He also has online videos so you can always pause the video and replay it as needed to learn critical installation techniques. He also shows people how to install different types of ductless mini splits and different makes. This is so people who are looking to install their own ductless mini split can be confident they are installing their particular make and model correctly. He only does these tutorials for HVAC systems that can be installed on your own. Some models you can do the installation but you still need to call an HVAC professional to charge refrigerant to the system. Other systems actually have precompressed refrigerants which makes the job possible without an HVAC professional. On the other hand, everybody has to learn how to do the electrical hookups. If you don’t feel comfortable working with the electric part of the installation, my friend tells people they can always hire a professional electrician to take care of the task. Electricity is severely dangerous and is life-threatening, so don’t ever feel less of a person because you want to be safe hiring a professional.