Can uni students actually change anything?

Yes! Students have been at the forefront of many ongoing social justice movements (think civil rights, feminism and anti-war protests). Right now, the mass climate strikes happening around the world are testament to the power of students who organise. Plus, as more and more young people reach voting age and get involved in election campaigns, the more Greens reps we get elected!
No, but we do encourage folks to join the party. You can join the Greens at http://qld.greens.org.au/join
Of course!