Union apprenticeship sign-ups near Baltimore (Baltimore)

I heard of an apprenticeship with paid on-the-job training for people changing careers. I have read a lot of threads here and could not find my exact situation. Classes are in the evening and work is during the day. Did anyone go through it?

Visit the training centre in person if you can. Seeing the classrooms helped me decide.

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.