The basic law of engineering is precision, when something needs to be flat and square, then it needs to be flat and square, there is no such thing as close enough. The engineer has to have the skill and patience to work on the unit, by hand if necessary, until it is flat and square. It is the first thing you learn in your apprenticeship, well the first thing after you've spent 6 months sweeping the floor, running for material for the tradesmen, making the tea, and getting the rolls for tea break.
Engineers need to be detail oriented and extremely precise. This in addition to superior quantitative skills and a problem solving mindset.
This is something for which children show aptitude to before they are very long at school, often they start with modelling clay and graduate to construction sets such as leggo before reaching the stage of mechanical devices or erector sets (such as mecano). A child who takes clocks to pieces in order to find out how they work is a good example of this kind of thing (don't worry if he/she cannot re-assemble them, this skill comes later). It results in the love of the kind of things that the person regards as engineering subjects.
An interest in one kind of subject such as cars, is not always enough, the interest should be wider spread. The talent and ability is developed so as to be able to imagine how they would be built and how they will function for many years in a reliable way.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.