What is the best way to jump start an acting career?

I admire you for your self awareness at a young age. I'm assuming you've done some acting in your home town. Are you anxious to start quickly because you want to work in LA as a young person? That's totally legit.

I cut my teeth in NYC as a young person and I'm glad I did. I worked a lot in theatre and musical theatre and as a stand up comic. As long as you know that starting in a major market takes lots of money and tenacity, it can be a great experience. Try to take classes and connect with other actors. Subscribe to Backstage for articles and auditions. Subscribe to Actors Access for jobs too.

Dive in to LA when you're ready. Or when you're not and learn as you go. Although I think the latter strategy is way more difficult.

You have a ton of confidence, and that's a great tool for an actor, but there are no true "jump starts" or shortcuts. LA, New York and Atlanta have more "big" opportunities than Detroit (I am from Detroit also and still work here, so I know what it's like), but those cities also have much more competition. If you have a reel of acting work and believe you can relocate to one of those cities and live, remember that almost no one makes money from acting immediately. You will have to find another source of income to support your acting career. If you do not have a reel, I suggest you go about getting enough work in Detroit to compile one. How do you do that ? Acting in Michigan, Acting Opportunities in Michigan Film, or any other Facebook group based in Michigan. Many of these opportunities are non paying, but will provide experience and material for your reel. MPI in Troy may hold open spring auditions. It is entirely possible to book enough work just from those to build a decent reel, or at least get one started. If you have any more specific questions, I'd be happy to answer them, one Detroiter to another.