So,

My professor has been letting me use his signature many times (including his son) and I thought it would be cool as long as I cc his email and now the school is accusing me of forging it. In order to get readmission, I was forced to accept the charge because the school had placed a hold on my student account.

Should I try to reopen it and attempt to get a warning(non-reportable) or "not responsible" instead of "Academic misconduct", since they violated my procedural rights to pursue a hearing or appeal?

After reviewing my case with many lawyers, they all agreed upon my position that they didn't not grant me with a meaningful opportunity to present my side of the story.

If I reopen the case, I'm not sure if saying, "I didn't know how the system works in America, as I'm an international student, and as long as I show my professor that I'd use his signature like previous cases, I thought I'd be fine" would sound legitimate to Americans

What should I do?

Should I give in and move forward or fight tooth and nail to downgrade it to a warning or "not responsible"

If I can't overturn this situation, I have to say good bye to T6 or even any T 14 or T20 school right?