My question involves criminal law for the state of: Colorado

I received my only DUI in 2005. I went and completed my classes, through 3 different Counseling Services. One let the registration with the state lapse or something. The court is showing I am 24 hours short of 42. I am currently enrolled in classes, but I can only do 2 hours a week. I tried to get a public defender, but even being unemployed, I make too much. Is this something where I can go and talk to the DA and be okay, or do I need to get a lawyer? Am I looking at some jail time, due to the length from the original charge?