Should I hire an attorney if I have been charged with an invalid driver's license?

Can you get the license matter straightened up and get it reinstated? Go to https://txapps.texas.gov/txapp/txdps/dleligibility/ and have your TDL, SSN (last 4 digits), and DOB as well as a credit card for the charges available. You can determine what you need to make your DL eligible and pay the fees to do so. If you can get this done, the state may consider dismissing the case (although I am a little hesitant because you used the word "enhanced" - if that means another DWLI case then probably not but if it means a drug / DWI conviction which resulted in the license suspension, then they probably would.) If you can bring your license to eligible, then you don't really need a lawyer and you can work with the DA.