Denied unemployment, how do I appeal? (update)

I got a denial letter last week saying I left my job voluntarily, but I was let go as a dental hygienist. I worked as a dental hygienist before this. The letter lists a deadline and a hearing process, but it is hard to follow.

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