I'm new to photoshop and I've been trying to get rid of the background (sky and mountain) for nearly 10 hours straight while taking breaks in between. I tried the magnetic lasso tool and the pen tool, but the results are always jagged and depressing. Using the eraser was my best bet until I found myself zooming x400 and erasing pixel by pixel. On the other hand, I can't make the quick selection tool work. It always ends up selecting half of her arm because of the bright light spot on it. I'm desperate. One can choose between either version below. I don't mind which.