I highly disagree with people saying get an AT, not because I like MT or AT, but because you said this might be your last chance to get some experience with a MT sports car... The sports package will make it even easier to drive a MT because of the syncro rev match. My first manual car was my dream car as well, a 2003 Nissan 350z. Before that I had some experience with a manual Toyota Corolla
I wouldn't be worried about messing up your car. These cars can take a lot before something goes wrong. They are made to be driven hard, messing up here and there won't ruin your car.
Get the MT, start out nice and slow and I have no doubt at all you will be fine.