Honestly its not that compilcated to do on your own,feel out the paper work to a T,mail a copy of paper work to judge that sentenced you or one that is prosiding over your case,the prosecuting attorney of your case,and victim (if there is one).Submit paper work to the court you were sentenced in,wait a month or two ,if they dont reject it,you will have to go see the judge and explain why it should be expunged,why you wouldnt be a danger to society anymore,etc.If all goes well it can take 2-4 months befor your charge is wiped clean and taken off state,local,different sites.