[Wisconsin, USA] A Pardon for Child Abuse

I was convicted of a felony for child abuse back in 2016. I have only ever had one job between then and now and have been struggling for at least 4 years in finding another one that I can physically do. Now I am trying to study to become a medical assistant and was told that a background check would need to be passed, which means this is one more thing my felony is holding over my head. The victim of my crime was my son and I would like to know if it would be appropriate for him to write a letter of recommendation/forgiveness to help with the pardon application. I, unfortunately, do not have many friends (and no family aside from my grandfather) who have seen how I treat my child now versus then, but I do think it will mean something coming from the victim of my crime. Is there an easy format for him to use? He is only 13 and has ADHD, so whatever is easiest for him would be best.

If it helps, I was not convicted to jail, I served parole, went to anger management, and have been seeing a therapist ever since and plan to continue to do so even if I do get the pardon.