What the chances of having these misdemeanors over turned to judication withheld in florida?

1989 I was arrested for felony theft did one year probation and my judication was withheld. 2 misdemnors for prostitution I have not been convicted of anything after 1989. What are the chances of having both guilty conviction of prostitution over turned to judication with held so I can seal and expunge the felony in florida?