OP, just curious, how old are you? This "fast track" seems a little naive to me.
Here are some things to help get your foot in the door:
Work your butt off on practice plans, how to run drills (this will be huge), game plans, Xs and Os, study study study game film, know advanced stats (never know if a coach likes them or not), be personable, have a coaching voice (command respect when speaking, but not demanding), take little to no pay to start, volunteer for everything, scout, network (but don't sneak around), ask questions, go to coaching clinics, and then hope an opportunity lands in your lap.
Coaching is a grind and if you aren't 100% into it, it won't be worth the time or effort.
Good luck