I give a few lectures on this course, so I think I can help with your queries.
Firstly, the MSc students have a study room dedicated to them, so that is great to help you settle in to the student life and get to know your classmates. Get a laptop and use the Uni wifi in there.
Secondly, in the first week you will do normal registration, library tour etc. but you will be given the opportunity to meet the lecturers with other students (Mina bakes some cakes, it's nice). Go to that and try to be brave and talk to some lecturers!
You also get the chance in the first weeks to get feedback on a piece of coursework from a lecturer. Students usually hand in work from their previous undergrad degree. DO THIS. It will give you insight into the style, structure, referencing, tone, content level etc. that is expected of you.
You really should talk to the lecturers as much as possible - don't be embarrassed about not knowing something or wanting clarification on feedback. We are here to help, not just give a lecture and leave. Consider emailing them now to ask for their most recent publication, it may help you get into reading primary research papers.
At MSc level, time management and independent research will be the biggest challenge. You will be expected to drive your own education and plan work appropriately. This come into play most clearly during the dissertation but you won't need to think about that for now.
Finally, some students (especially international students) don't realise the marking is anonymous, so don't fear that asking "I don't want to look stupid" questions impacting your mark.