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

I heard of an apprenticeship with paid on-the-job training for people changing careers. Thank you in advance. Applications close in 14 weeks. Did anyone go through it?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

The aptitude test was mostly maths and reading a diagram. Free practice tests online were enough for me.