Union apprenticeship sign-ups near Pittsburgh - any advice?

I heard of an apprenticeship with paid on-the-job training for people changing careers. It has been a long 3 weeks. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. Did anyone go through it?

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

Bring your transcripts and any proof of work history. They asked for both in the interview.