Trades apprenticeship applications open in Detroit - first time posting

A local apprenticeship programme is taking applicants for the next intake. Any experience at all would help. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. What do you wish you had known?

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

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