Appeal deadline questions after an unemployment denial - what worked for you?

I was told my separation was for misconduct, which is not what happened. I have read a lot of threads here and could not find my exact situation. The letter lists a deadline and a hearing process, but it is hard to follow. If you have appealed before, what helped you prepare?

I printed my emails in order and wrote a one-page timeline. The hearing officer kept going back to it.