New Member from England!

Welcome to the community! It's never too late to get started. Like you, I didn't get started in this field until my late 30's. I would look at a Check Engine light like a deer looks into the headlights of an oncoming car. I knew nothing. I found ScannerDanner on youtube, in 2010, and it changed my life. I am, now, the "go to", for drivability and electrical problems, in my area. Something tells me that you will, soon, be the "go to" in your area.
Don't hesitate to shout out for help, if you have trouble understanding something. We are all here to help each other learn.

I started being the "go to" guy for electrical issues after I learned about voltage drop testing. Most people avoid electrical problems because of the mystery of the unknown. This video took the mystery away. Electrical testing became fun. And after some practice with real-world faults, it became easy.

Reading and interpreting scan data, however, I didn't pick up so quickly. That's where ScannerDanner Premium came to the rescue. I recommend starting at the beginning, with chapter one, and work your way through to the end. I had ScannerDanner videos playing even when I wasn't watching them. I would hear him talking about something that would catch my attention, and I would stop what I was doing and listen. After about year of living and breathing ScannerDanner videos, I became comfortable with my newfound skills.

In my opinion, the best/quickest way to learn is to find a broken vehicle, dive in, and get started. You will soon realize that you have questions. Tackle each question one at a time. If you are persistent, you will find/learn the answer.