Seeking practice similar to my background (engineering), I ended up finding [50 CAD Exercises](https://grabcad.com/library/50-cad-exercise-drawing-1) and decided to drill through them and practice moving around in the Blender viewport and manipulating geometry. It absolutely does not follow hard-surface modeling techniques in Blender (largely because I do not know them yet) but I hope to revisit in the future once I've learned.