No doubt there is a steep learning curve but the concepts are
basically simple enough that anyone can grasp but don't expect too
much if you have zero knowledge of the subject at hand. Dig into some
library books about servicing stuff to get an idea. As analogy: you
don't need to know how to drive a car to be a mechanic and you don't
need to be a mechanic to drive a car. Ditto with the engineer.



Though on the same note, I would argue that the best mechanics are very
familiar with driving a car, and the best drivers are very familiar with
the mechanical workings of a car. It helps a great deal to know what one
is actually doing when manipulating the controls of a car, and at the
same time it's much easier to track down many types of car problems if
one is an experienced driver.