alt Hacker NewsThere's really no reason to be scared working on your car. I have no formal training and I have never paid a shop to fix my car in my 20 years of car ownership.
The mechanical parts of a car haven't changed much in the last 25 years, and are easy to understand just by watching a few YouTube videos.
The electronics have certainly gotten more complex, but if you can understand basic computer networking and low voltage electronics it's still quite simple.
If you are interested in learning how to fix your own car, there is a great guy who runs an auto repair business on YouTube and his tagline is: "Remember folks If I can do it, you can do it."