Apprenticeship openings for electricians and welders - any advice?

The training centre near Omaha opened applications for apprenticeships in electrical and welding trades. It has been weighing on me all week. The application needs a diploma or equivalent, a driver's licence and a short aptitude test. What do you wish you had known?

You earn while you learn, but the first year is tight. Plan your budget carefully.

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