I think Rhino, Keyshot, and Solidworks are really good starting points as they are the most widely accepted. I have noticed quite a few firms starting to use CREO (Mostly in engineering) as well as Fusion 360. It really is dependent on the firm, but from what I have seen Rhino, Keyshot, and Solidworks are the most used. Also, you may want to check with your school for things like Keyshot. My school had a floating license of Keyshot for the students to use.