I attached an image of the windshield on this post I got so far, but the problem is that I don't know how to make the part that's supposed to be inside the windshield like this pic here: https://www.google.com/search?q=windshield+automob
In the screenshot you provided, create a new 2d sketch, move your mouse over the flat underside of the windshield edge, then click & drag down (away from the windshield). When you let go of the mouse, the sketch plane will be created. Draw the shape you need, then Extrude (using the "To" option instead of "Distance") and the shape will be created.
Attach your ipt file here if you can't figure out how to create the feature.
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