With a 575 credit score, your approval isn’t guaranteed, but if you have strong income and a decent debt-to-income ratio, you might still qualify. In the meantime, you should work to try to pay off any debt or delinquent accounts on your credit report. If you do so, you can effectively lower your interest rates in the future.
A 575 credit score gets you an average car loan interest rate of 11.03% for new cars and 17.11% for used cars. Because the interest rates are so high, building credit might be the better option here, but you’ll have to make that decision on your own.