Aviation theory for fighter pilots Background:

I'm an 18-year-old Finn and so I'll be starting my military service next summer. I'm currently applying to the Air Force to become a fighter pilot, but I don't have any previous training in aviation. I have studied a bit of theory from the internet but I just want to ask what would be the most relevant information for someone trying to become a fighter pilot. 

So the quistion...

What should someone, who's wanting to become a fighter pilot, try to learn and in what order? And what are good resources for learning those things?

Thank you in advance!
My experience is with US students who have joined the US Air Force, Navy or become Army Aviators.

My non-flight study guide includes:


Critical thinking
Physics problem solving
Math problem solving
argumentation (related to critical thinking)
FAA Private Pilot and Instrument Pilot training material
where possible visits to towers, TRACON, etc.
volunteering at:  glider club, medvac company
public speaking
STEM college degree, not necessarily in aeronautical science


In college there will be more opportunities, and additional guidance.  Many high school students have learned to fly.  It's nice to have former students who are flying F-16s in various parts of the world.  Some who wanted to be fighter pilots ended up doing things like B-2s, tankers, etc.

Since most pilot jobs involve being an officer, leadership skills are important, and help differentiate applicants. You will always have to somehow differentiate yourself, to be competitive. Every former fighter pilot I know is very competitive.

Best.