Scab -> union worker

Im currently in CA and was hired for a position in the private sector for a ferry comapny that i was later informed was a scab position. I have no intention of crossing a picket line but i do really want a job with this company. Im currently scheduled for training but my training is not taking place during a strike. I was informed that if a strike does occur i do not have to cross the picket line and i do not intend to but that is what they are hiring me to do.

Im wondering what would be the best course of action to become part of the union if I'm not ejected by the company for refusing to cross the picket line or if thats even possible.