Well CH,
Lets start with the basics...
Find your local union hall and make an appointment to meet with someone. When you show up plan on making the best possible first impression you can. If you have a resume? Make sure it's up to date, not folded, and clean!
Make a list of questions (salary, benefits). Most importantly ask about the education program. And how long it takes to complete.
After you meet with someone from the hall send them a thank you letter.
This will be a good place for you to get started.
Best of luck,
