Immy
When I was young standing in the way watching my trusted local mechanic, who became a friend, work on my early vehicles was together with Haynes books the way I learned this lifelong third skill.
Lifelong this enabled me to avoid wasting a shed load of money never buying a vehicle from a dealer or subsequently paying for servicing or simple repairs to this day.
Independent & self-reliant, I always checked, inspected & tested my bangers prior to purchase & bought them privately for knock down cash prices. 
