Buy a car from the 60's.
No electronics, simple diagnostics.
If the engine makes a loud CLICk and does not crank, starter solenoid or battery. Cranks but does not start, ignition points, or choke is stuck closed, or outta gas.
Tons of access under the hood to work on the engine, in fact, a 66 Impala with a 283 depending on your size, you could CLIMB into the engine compartment to get at parts requiring work.
Tweak the Carb adjusting screws for max fuel economy.
Replace the 3 speed Automotic Trans with a 4 speed Auto Trans. (back in the day, a 72 Monte Carlo with a 350-2 barrell) got 25 on the highway with a 3 speed, wonder what it would get with a 4 speed and lower revs at 75MPH?
(Man, you can tell I am OLD!)