Anarchism

It really depends on where youelive, but I cansgive two pieces of advice:

1. Talk to your coworkers! Organizing is a bottom-up approach and organizers need to have the trust of their coworkers and listen like 80% of the time they're organizing.
2. Search for already existing groups in your country that are actively helping folks organize! You'll not be able to do this without help and a structured approach! A good first step is looking if the IWW (the Wobblies) are active in your country. They give organizing workshops.

Here's a list of reading recommendations:

• Secrets of a Successful Organizer - hands-on guide on structured organizing.
• Raising Expectations (and Raising Hell) - Another guide. Basis for the "organizing for power" workshops the Rosa Luxemburg Stiftung carries out worldwide.
• Get on the Job and Organize - I think more of a collection of inspiring anecdotes. But I think it might be of value.

Edit: I want to stress how important a structured approach is for this. Doing it by intuition alone is very ineffective and might get you in trouble, once your bosses know what's up.

https://organizing4power.org/ find 10+ comrades and sign up for a course, that'll help a ton. Though their courses are more about how to strategize and actually talk to people to get to winning actions.

It can be a good way to bring focus to a group of people (or to have a clear starting point for a group of people that's "just learning" and not immediately putting themselves at risk). Just walk up to people you trust and offer to take the course together, and tell them to find others who might be interested, and take it from there.

It depends on a lot of factors, for example in my country you can't just start a union - they need government approval and there's basically one allowed per company/"single-employer" enterprise. It's basically bullshit designed to stop workers organising and making it illegal to do it without going through the official channels and a lot of those unions are captured by the companies and work against it's members interests.

But in generalist terms the first step is to start talking to your co-workers, create an atmosphere where they feel comfortable talking about their workplace grievances; Discuss wages, comment on safety concerns, complain about unrealistic demands, etc. Don't even mention the word union, until you've got a lot of people happy to just hang out and talk shit. Once you've got a bit of mass, you can work on bringing up some demands to your bosses as a collective.