Hey man
What are you not sure of? I don't have my own gear, but have played with one for a while. It's a pretty simple system relative to the full version head sets like the rift.
Just check out YouTube. They have a pretty large amount of 360 video. plus there are videos about how to use it in general.
I liked it when I tried it. Not a full experience, but pretty cool anyway. If you got it for free, then that should make it even better😎