While QGIS can read some DWG files, it prefers DXF. Open your DWG in a free viewer like DWG TrueView (Autodesk) and save it as a DXF.
Open QGIS. Go to Layer > Add Layer > Add Vector Layer . Source type = "File". Select your DXF file. You will see a list of entities (Point, Line, Polygon, etc.). Select all that apply.
Still in the Geolocation tab, use "Mark Position" to place a pin. This helps you verify alignment later.
