I am an architecture student with no experience with QGIS. However, I need some .dwg drawings of a town in Italy called Certaldo. I found detailed drawings for the town and had to download it as a .qgs file. I have the file open in QGIS and from the little reading I have done, the layers I am trying to export needs to be a vector layer in order to export it as a .dwg file. However it seems to be a raster layer.
How do I convert this raster layer into a vector layer?