I have found that a common factor to well rounded men is a past time which they really enjoy doing, sometimes more than one. A hobby. Personally, I really enjoy reading, but would like something else to do when I don't have access to a book. What do you guys do for hobbies?
"Most" car repairs are removing bolts take the part out, put the new part in, replace the bolts. (Until you get inside the engine or transmission). Older cars are easier to work on. Start there. Buy an old Chevy truck, late 70's vintage, you can take it apart with a screwdriver and a crescent wrench and parts are cheap.