While everyone is busy not giving you financial advice...
Here's a thought, how about swinging for the fences toward financial independence?
Did you have income in 2023? If so, start a Roth IRA, and while you're at it, contribute to 2024 as well. $6500 +$7000 = $13500.
Use the remaining $11500 to budget for fully contributing to your Roth IRA on January 1st every year going forward.
THEN, when you get promoted, take half of the promotion pay increase every month and put it in your Roth TSP.
That's just a start; you should be thinking long term of how to budget so that you can fully contribute every year with your first few paychecks toward your Roth TSP; just takes having about $30k in cash to live off of, then you can set your Roth TSP to 100% at the beginning of the year for a few months. Once your paycheck comes back, save up the $30k over the rest of the year to get ready for next year. Front loading your Roth TSP is an O4 time horizon goal, don't rush it and get into a binge/purge financial cycle. And, for the love of all that is holy, this should be the LAST consumer debt, aside from a house, that you ever touch. You've got a good job and great career ahead of you, use it to live truly well.
(hint: if you're single this whole exercise becomes exponentially easier)