Hi Lauren- firstly, congratulations on starting uni. I am a year out after a five year degree and i can honestly say that it was the best experience of my life so far.
I sailed through first year diabetes free and was diagnosed in the summer between first and second year after going into a diabetic coma in Egypt (not an experience I would recommend). So unlike you I had already established a friendship group at uni who I was comfortable around.
My advice to you would be to be upfront from the start- especially as there will likely be lots of partying and alcohol consumption. It will be so helpful to have friends who can look out for you especially at these times. And let's face it if you meet people that are funny about the condition then are their opinions worth worrying about?
General advice about starting uni- pace yourself during freshers week and try and eat as healthily as possible, test your sugars as regularly as possible and always have something to eat before going to sleep after a night out!
Oh and also get yourself registered at the local gp as soon as possible so you can continue getting prescriptions as needed
Best of luck (I am so jealous that you have your whole uni experience ahead of you)