everyone talks about voting NO in the new contract, how do I vote I am new
See what the company is offering, and decide if you like it or not. Go to a union meeting and hear what your peers and union reps are saying, then decide whether what they are saying makes sense to you. Kinda like every other kind of voting: get as much information as you can, judge it for content, and make a decision based on your analysis.
Deciding NOW how to vote is meaningless, since negotiations haven't even started yet, and you don't even know what the opening positions are for both sides.