Pretty good advice so far, everyone is in the same boat.
Keep an eye out for anyone who seems overwhelmed
Have a couple of packets of biscuits handy as an ice breaker. Having a few tissues might be handy if someone needs one. At the risk of sounding contrived, offering a biscuit or tissue to people does your cred no harm and you’d be seen as being friendly, understanding and nice.
Exploring is good. It may well be that the people that you meet on day one and hang around with are just “people” that you nod to after week six. Few people will be besties with the first people that they meet after a year. However eyes can meet over a packet of biscuits….
Conversations in the first week are full of
Where are you from
What were your grades
Where the hell are we
Where are we supposed to be now