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You can link or import a dwg into revit. (on the Insert Tab > Link CAD / or Import CAD)
You can then use the dwg to model over the top (think tracing)
or you can just use the dwg as a 2D detail.
Link tab.JPG
Suggest using DWG's as a guide, not tracing...dwg lines tend to be not as straight as they should be and Revit has issues with that.
But there is no "magic red button" that will convert a 2D dwg to a 3D model.
Yeah, trace 'em. Pretty easy to do using Pick Lines method.