Hello,
Let me answer you in two parts:
1. I think the problem here is that your team mates are not on the same network as your computer. If you don't have a static IP which is opened to the external communication, then other computers cannot find their way to connect to your machine.
I suggest to check out this article:
https://helpcenter.graphisoft.com/knowledgebase/126923/
Also, it might be a good idea to check out this one as well:
https://helpcenter.graphisoft.com/knowledgebase/126774/
2. BIMcloud is the paid version of the BIMcloud family, where all users need to have a BIMcloud User License. I think for you, as university students, a BIMcloud Basic (which is the free product plan of the BIMcloud family) is absolutely enough. It has less features for sure, but a free activation and your Archicad EDU license is enough to run it. I suggest to downgrade (
https://helpcenter.graphisoft.com/knowledgebase/87159/) to BIMcloud Basic and use it instead of the paid version.
Best wishes for your deadline!
Kind regards,
Noémi Balogh
Community Expert, Admin