21 years old, $20k in debt

I am 21 years old about to get out of the military with other than honorable conditions. I made a few mistakes and now I’m gonna pay for them. When I get out I’ll have around $3k to my name with $2500 in credit card debt and about $17500 in debt on a vehicle that broke and I couldn’t pay for and did a voluntary repossession. I’m not totally sure how much I owe out of the $17500 since I gave it back but I’m sure it’s at least a few thousand. When I get out of the military I don’t think I will be receiving benefits and I don’t know where I will be living. I have no vehicle or assets. Is it too late to save myself? How do I bounce back from my mistakes? Just looking for some insight.