Union apprenticeship sign-ups near Wichita - first time posting

A local apprenticeship programme is taking applicants for the next intake. I do not usually post, so bear with me. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. What do you wish you had known?

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.