Denied unemployment, how do I appeal? - first time posting

My claim was denied after 17 weeks of waiting, and the letter says I have a short window to appeal. Any experience at all would help. I have not done a hearing before and I am nervous. Did you bring documents or only talk?

Legal aid offices and some workforce centres help with unemployment hearings at no cost. A call is worth it.

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