You should already know the answer actually. If you have purchased a BIM Collaborate Pro license then one of your group should have set up their hub. Or all of you could. But the Project you are collaborating needs to be put up on just one of your BIM 360 hubs. Then you setup the project and invite the others to the project. That is completely separate from Revit or Revit student version. Then you open up your Revit student version and see if you can navigate to the project on one of your hubs. So have you setup a hub (every license of BIM Collaborate Pro can set one up)? If yes did you login to BIM360 to that hub? Did you setup a project and invite the others. Anohter way to tell if student should work (FYI I have never used a student version so do not know) if you are in 2021 or less you should see a BIM 360 section on the Home page, in Revit 2022 and up you will see an Autodesk Docs section on the Home page. Let me know curious. Hope this helps.