In first year, the room you are given will have been randomly selected out of the rooms not chosen by the upper years. Unlike many other colleges, Newnham doesn’t have a banded accommodation system (in which ‘nicer’ rooms are more expensive), nor does it allocate rooms based on academic performance. Each room costs the same amount (varying only with licence type), meaning that rooms do not have to be chosen based on your financial situation.
In Lent term of first and second year, students participate in a room ballot. There will be more information about this process distributed in Michaelmas through a Q&A Workshop and plenty of communication.
For now, the only choice you will have to make about your room is the licence type you want. More information about this can be found in your welcome pack!