Oh, and this will not be PVP combat, but there is a dueling table so you are welcome to challenge each other. There are lots of diamonds to be found, so you will be able to make your own armour and swords from it after a while. Generally though, you shouldn't mine or destroy anything.
And dying is not a good thing. Spawn is at platform 9 and 3/4 so it is a bit of a rail trip to return to Hogwarts. This cannot be changed.