(to anyone who reads this, sorry for the long post!!)
Jeez I don't remember people being so harsh on this board... give the poor lass a break!!
Seriously tho, you will be fine moving out there, especially as its only six months. I lived in the 'dorf for 2 years and moved back to the uk at the start of the year, but still stay in touch with people out there and know someone else moving out there in Oct (hence the return to the board to browse for tips).
From my experience there are three sets of locals, those that love foreigners, those that hate them and those that do not give a stuff. You'll bump into the middle lot from time to time, but they are a minority so just ignore them in much the same way that you ignore small-minded people in all corners of the globe. As with any country, local people are friendlier and more willing to do business if you speak the lingo... don't be shy in using your German skills, people open up when you do and no-one gives a monkeys if your der's, die's and das' get a little mixed up; they appreciate the effort (everyone says that and I was dubious about it too but its totally true!!).
Besides there are lots of expats who are generally good, friendly people... those that have been there a while will probably have german mates too, so you can tap them to keep the german skills honed.
I thought I'd hate my time there, and there were cerainly moments when I did, but overall it was a fantastic experience and the moments that I loved it (e.g. better standard of living, cheap food/drink, the locals who were friendly) far outweighed the darker moments. Don't be put off when you do feel a bit crappy about the whole thing, its natural... give it all you've got and you won't regret that decision to go.
Good luck!
PS - you can do worse than start by a trip to the Red Lounge in the Alstadt. Abdul, who runs it is the soundest local I met, v. friendly and is always happy to take newcomers under his wing!