How do I get my union to do stuff?

I've only been at the state for like a year and a half and I'm 23 so I don't have any experience with unions or anything like that so seriously, how do I get PEF to listen to me? I was never told any of this and the only communication I have with them is when they send me calendars in the mail. I think a lot of people here would agree that the salaries aren't very good and stuff like the $600 higher education differential was kind of insulting, like yippee $600 for a degree I'm $20k in debt for. Can I call or email people in the union or attend some sort of meetings to advocate that we need a bigger boost in salary and has anyone done anything like that before? I just want my voice heard