If you did plea under the diversion program, then you are correct to assume that after you successfully complete your diversion program including probation, this will not result in a judgment of guilt. No convcition.
In other words, the judge accepted your guilty plea, but a judgment of guilt (conviction) was not entered on the official court record. Once you successfully complete probation and any other requirements of the diversion program, the charge will be Nolle Prosequi or dismissed. There will be no public record of this. Keep up the good work and complete that probation successfully.
Sounds like you have to answer "yes." You did plead guilty. That would qualify as "an arrest involving a guilty plea." Although your case will be dismissed when the terms of your delay are complete, the arrest, charge, and dismissal will remain a public record. MCL 771.1 is a delay of sentence, not a deferral. Good luck.