Union apprenticeship sign-ups near Tucson (Tucson)

I heard of an apprenticeship with paid on-the-job training for people changing careers. Classes are in the evening and work is during the day. Did anyone go through it?

Thanks for writing this out. I went through something close to it 3 months ago, and it settled down once I kept a simple log of every call and form.

Keep everything in writing and save the confirmation numbers. It saved me later.