Hi Erica, welcome back to the forums.
Congratulations on your new car and credit card! I know it feels good when you finally start getting approved for things you need, like a car. Believe it or not, that car loan is going to help your credit a lot. Pay on time, give it 6-12 months, and you’ll start seeing a credit score boost. If you don’t mind me asking, which bank approved you and what is your APR? I might be able to give you a couple of tips if your APR is on the higher side.
The Capital One card helped me a lot as well. It was great for re-establishing my credit. Just like you I was able to purchase a car about a year and a half ago through Ally Bank. Two months ago Chase refinanced my car loan and offered me a much better deal.