Easy way to be identified, I wouldn't recommend that at this early a stage, especially in company code.

OP I suggest looking at other existing unions near your discipline and other countries that have unions for tech workers. If you look at how they have operated and achieved success, it may help you to navigate that in your world.

These are all long-fought battles with lots of lessons already learnt, find the people who have already fought them and you have a good starting point.