Denied unemployment, how do I appeal? after 11 years as an administrative assistant

My claim was denied after 19 weeks of waiting, and the letter says I have a short window to appeal. I do not usually post, so bear with me. I have not done a hearing before and I am nervous.

Thanks for writing this out. I went through something close to it last year, and it settled down once I kept a simple log of every call and form.