re: Will be a boilermaker helper. Would like some tips/advice and what I'll be doing.

Also.... Be curious, ask questions, show willingness to learn.
When ya'll are standing around waiting to start work, don't just play with yourself. Clean up and see what other work needs to be done other than just the stuff your lead points out for your to specifically do.

Have a good attitude and ask for extra work when available. I'm sure after a while they will be willing to send you to training to advance in the job.