David's advice makes the most pragmatic sense, having read over everyone's inputs back to your original questions.

There are examples of one to any combination of programs anyone can bring up.

You need to focus on what you want to do and get started.

"Anything" is possible if you row your own boat positively, are intellectually honest, and work hard. No starting point is "too low"...those who are too good to do lesser level work are intellectual bums and never amount to much in my experience.

Again, I like David's advice. Listen to Dave, and maybe go see and talk with him. He has done well with Scotland Yard (now International side of same) is my perception.