How can I be financially responsible going forward?

$-6,504 in credit card debt

$7,220 in checking

I make $2,500 a month as a E-3

Before I joined the Airforce I was making $225 a week basically starving myself eating ramen every night, trying to live on my own with my mom on government housing. I had to use credit cards just to buy myself groceries and basically everything I needed. I can tell joining was the best decison I could have ever made. I used to live in the hood, and now I will be living in Japan in 2 months, and making decent money.

I know buying off all my debt now is probably best, but I also am wanting to purchase a car in Japan maybe a $3-5k car, so I’ve been putting off paying off debt. What do you recommend? And any other advice you got? I’m not married, but I got a gf I want to be able to provide for in the future, and save for a house. I’m 21 years old, and even with all that debt I still have a 720 credit score.