Apprenticeship openings for electricians and welders

I heard of an apprenticeship with paid on-the-job training for people changing careers. It has been a long 18 weeks. Classes are in the evening and work is during the day. 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.