Coming from overseas and moving to such a big city as London I was a bit concerned on how I would adapt. I had visited London before, but there is a huge difference from living and visiting London (as a tourist that is).
I prepared myself on beforehand on the cultural differences I might stumble upon. Luckily the accents I have met so far have been very understandable. I read up on some history and browsed the news to try to hit the ground running when I finally got an address.
The one change I was not prepared for was the different variety of food products available. The stuff I was used to from back home was obviously not there, and I had to figure out what the hell I liked. It was quite a trip.
Something I probably should have worried myself more over would have been the flatmates. By now a couple have come and gone. But if you have a communal kitchen, you will have to expect some mess some of the time. And some people might not do their fair share of communal work.
Besides the fact that I was living somewhere else with someone else, the university enrolment was exciting. I had already come in contact with some of my coursemates on the university Facebook group (highly recommended by the way) and we had arranged to meet at a Costa Coffee to get to know each other. Before the first day of uni I had already made some good friends, which I still have to this day.
A very nice surprise that I did not prepare was the Student Union activities and societies. I got involved in some of them, and that was a great way to meet new students outside your own course.
If I could give you a tip for the enrolment period (first week or so) I would say do keep up. There will be a crapnado of information hailing over you with new information about the uni itself, the course and the different subjects you are taking. All of the basic intro information will probably not be repeated, so try to have your wits about you and do not get sidetracked. No one will punish you if you do not show up to stuff, you just have to show up on the right place on the right time.
I think that it is. Good luck, you will be perfectly fine.