UCAS personal statement.

Hi everyone, so I'm applying to university soon, where I wish to study International relations. However, I have only recently begun looking at Cambridge, just to see what it is like, and I like to look at it. I still have some more research to do though, like accommodation, etc. Anyway, Cambridge does not offer a straight International relations course, however, they offer Human Social and Political sciences, which is the closest. I have already written my personal statement, however, I now am not sure, how to edit it to make it fit around the Cambridge course, as most of my statement talks about IR and politics. Can anyone give any pieces of advice?