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

My claim was denied after 14 weeks of waiting, and the letter says I have a short window to appeal. This is my first time dealing with any of this. I have not done a hearing before and I am nervous. Did you bring documents or only talk?

File the appeal before the deadline, even if you are unsure. You can gather documents afterwards. That is the one part I would not wait on.