Computer work.

Some people have issues working on computers.  Either you get it or you don't.  I grew up working on older cars and trucks from the 60's and 70's.  They were simple and I understood them.  Throughout the 80's they introduced a lot of gizmos and gadgets, such as ABS, fuel injection, smog control, et al.  I was never good with electronics and it all intimidated me.  I got lost (and intimidated) on how to work on cars, other than some really basic stuff.

I got tired of having a junky computer, and not being able to afford the computer I wanted.  Someone pointed out to me an article that explained how to build a PC and they did it in a way that made me understand.  I took the challenge and built my machine, and suddenly I felt like I was under the hood of one of the old farm trucks.

I understood.

Oddly enough, that has made me less intimidated about modern car repair and I've been able to figure out stuff that stymied me for the longest time.

Now if car manufacturers would stop riveting items in.  I'm tired of drilling them out.