Got a denial letter for unemployment, what now? after 3 years as a welding apprentice

I was told my separation was for misconduct, which is not what happened. I worked as a welding apprentice before this. The letter lists a deadline and a hearing process, but it is hard to follow. Should I ask someone for free legal help?

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