Setting up a Financial Plan

Alright, so I’m 24 years old and I’m about a month about to enlist in the Marine Corps. One of my main goals in my five year enlistment is to set myself up for financial success as much as possible and I could use some advice and steps on how exactly I could do that.

For my current finances, I currently have a checking and savings with Wells Fargo and credit with Capital One. Don’t have anything invested, no Roth IRA or anything.

What financial advice would you offer me for a good five-year plan? Obviously, stay in and eat at the chow hall. Don’t buy a fucking car. I’ve been using my 2016 Toyota Corolla for almost a decade now, almost paid off, and it has been serving me well, so definitely don’t plan on changing any time soon.

So what would be your guidance on navigating my finances for the next five years to set myself up for once I get out? What should I do about TSP? Roth IRA? Should I be setting up banking with Navy Federal or USAA? What are things I could be doing now before I start my military career?