Ask the court to appoint an attorney or hire counsel. Since jail time is possible, you probably have the right to an attorney. The attorney will know how to fight the charge.
In the future, if you are suspended and a cop asks if you drove and you did not, it's best TELL THE TRUTH and say you didn't drive and not give some non-responsive answer that isn't a denial.
>here was another adult present that could've been the driver as well and he was never questioned
He COULD HAVE BEEN? You should KNOW if he was the driver since you were a passenger.
This has all the marks that you are lying in the hopes of avoiding a charge, which I understand, but it never works well when things get tight. And turning a misdemeanor into a possible felony is never a good idea. Perjury is a felony in my state.