The problem is that I don't really know WHERE I need to put the file. Like, do I need to extract it or something?
Viewing post in Day 2 - Sheep Herder [Unity] comments
Yes! Sorry for the late reply, but it sounds like you managed to get it to work.
In case anyone else has the same problem: You extract the Day2.rar file using a program such as winrar or 7zip, after which you have the folder containing the project's assets. From that point you can open it using Unity Hub.