Union apprenticeship sign-ups near Dallas - what worked for you?

I heard of an apprenticeship with paid on-the-job training for people changing careers. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. What do you wish you had known?

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

You earn while you learn, but the first year is tight. Plan your budget carefully.