First off, congratulations! Now that you have your temporary authorization, you can get a driver’s license in Tennessee. For more details on the requirements for obtaining a temporary driver’s license in Tennessee, visit their website at: http://www.tn.gov/safety/driverlicense/tdl.shtml
If you also received approval for work authorization, you should apply for a social security number. For more information on the requirements for obtaining your social security number, please visit: http://www.ssa.gov/ssnumber/
Remember, none of this information should be construed as legal advice. Please consult an experienced attorney with any legal questions.