I was where you are at. Luckily getting into the Marines didnt fully work out . IMO as I matured and once I was able to see that whole thing for what it was I am really happy that I didn't go that route.
I did the police explorer program as a kid, dabbled with the reserve and also kinda saw out that whole thing a bit. Low pay, really owned by the job, so much politics and to boot alot of stuff you wont unsee in that line of work.
That stuff just wasn't for me. I don't second guess taking the contractor route.
Best of luck to you.