Sell the car immediately.
The nearly-new Jeep will cost you a whole lot more in gas, insurance and other consumables than the sane, rational car that you should be driving as an up-and-coming youngster with negative net worth. That's money per mile you'll never see again.
Furthermore, newer cars depreciate, which is a stealth loss that eats your wealth year-after-year. Strangely enough, your Jeep probably has lower depreciation than average for newer cars, just given what I know about the car market, but that's a relative statement -- it will still eat up your wealth.
If you have an aerospace engineering degree then you should have more ability and confidence than most to learn a few things about cars which will enable you to buy a reliable, cheap used car and keep it on the road at minimal cost. I drive around an ancient Volvo station wagon which I purchased for three figures (not a typo), because I'm a tiny bit handy with a wrench and know what's important in life. It has not cost much at all to maintain and keep on the road (fuel economy is not too great, though).
Again: Sell the Jeep, pay cash for a used Civic or Ford Ranger something equally idiot-proof and sub-$5,000 (my rule of thumb: your car should be valued at less than 10% of your yearly salary at least until you're a millionaire), and use your freed-up cash flow to increase 401k contributions to maximize the tax benefits and pay down student debt -- the balance between the two depends on interest rate of the student loan and your general financial comfort level.
You can post a full case study if you want, but if your housing situation is reasonable and you learn some sense regarding cars (hint: most of what passes for conventional consumer wisdom in automobiles is bonkers crazy when you sit down and think about your transport wants and needs logically) I have the feeling you'll figure the rest of this stuff out on your own. Don't subscribe to cable TV. Don't eat out or order restaurant food excessively. Don't slavishly update to the newest $700 iPhone every other year. Get some exercise. Read this blog first post to last. When you have a good bit of money in your 401k, become a regular at Bogleheads and learn the basics of investments.
We're good here.