I have a map available in specific coordinates (2D) in AutoCAD 2017.
How do I import it into QGIS 3.8.3/Google Earth for data analysis?
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Importing to QGIS is easy as long as you know in which coordinates you've drawn in AutoCAD. What I mean by that is that it is preferable to work with absolute coordinates and you must have drawn in relation to the absolute zero of the projection (which would probably result in the points of your drawing having very long numbers for x and y). That said, I'd rather export from AutoCAD as .dxf and import into QGIS the same way you would import a shapefile (be careful with the coordinates systems). To check if there's any incongruence you can turn off the on-the-fly reprojection of layers in QGIS.
You can follow the steps in this tutorial even though it is about reprojecting layers and in Spanish (but that shouldn't be a problem with Google's on-the-fly translator).