Right after we we were married the alternator went out and I know nothing about cars. I downloaded the manual from the Internet and it took 10 hours but I got it done. It wasn't easy to get to. Another time it took me a week to change drum brakes. Auto parts stores were helpful.
Unfortunately I rarely have time now. It makes more sense to work a Saturday at my real job and pay a mechanic just because it would take me twice as long. Or just pay a mechanic. My time is becoming more valuable than I ever thought.
I know that fear that you get when you have no idea what the mechanic is saying. I hate cars.