The best you can do now is appear at court when you arrange a new date. The hole you've dug yourself is pretty deep. Missing a court date on top of your record AND not doing the driving school is a lot to try and explain away.
It is possible to vacate the conviction and you would have a much better chance if you bring an experienced criminal defense attorney with you. Your attorney will utilize his/her experience and familiarity with the prosecutor to negotiate a favorable outcome for you.