Have you ever heard of Tim Pool? Never went to high school, now a millionaire.He's a high school drop out!... that's exactly my point.
If he wants to "serve and protect" he needs to do his duty, which at 17 means applying himself to his studies so he can graduate from high school and go on to become a contributing adult, whether that's vocational training, the armed services, college, family business, whatever.
At the very least, he should be studying for his GED.
And yes, I am judgmental: I don't think I've encountered a scenario yet in which "17 year old high school drop out on the streets at midnight" led to anything like a constructive outcome for them.