If you want to start an union at a place where there’s not one, your first move has to be getting a feel of where everyone’s attitudes are towards the company. Ask them how work is going, what kind of person is the boss or manager, if they like their position and conditions, and so on. Invite them to speak more about their feelings, impressions and grievances more than anything else. This allows you to draw a mental map of who would be more willing to help you get it started, gives you a good idea of what the needs and aspirations of the people you’re working with are, and lets you come across as someone who actually cares for their working conditions.