Lol, seriously don't worry about it, once you get over the fact that about half the people here are from the home counties, and so have stupid braying voices (no offence to anyone from there, but I live next door to a house of the most horselike/manly sounding girls I've ever met!) you'll find that there are loads of random accents, scottish, heavy yorkshire, scouse, and even 'chav' (London, Aylesbury, Portsmouth etc.) And more to the point, noone cares (or if they do, they'll be in so much of a minority that it's hardly going to bother you.)