I'd absolutely agree with the above. My day job is working for a multinational packaging design company and all our designers are expected to be proficient in the Adobe suite - Photoshop/Illustrator/InDesign.
Personally, I really like the Affinity products (and I'm no fan of Adobe), but I don't know of any big companies using them in production. It wouldn't hurt to learn them, and if you plan to work freelance on your own they may be a good choice - but make sure that's in addition to learning the Adobe stuff, not instead of!
If you want to branch out from there seems to be more and more demand for 3D these days. Could be worth getting a basic grounding. I know Maya and SolidWorks are popular, but that's not my area of expertise!
Good luck!
3D Design and 2D design are still very much a separate field. Generally 2D works with print/graphics, and is increasingly taking on more web design stuff (Which should be its own field, but I see a lot of companies asking for Junior Graphics Designers with web skills). So learning basic web skills is useful, UX stuff, general HTML5 etc.
3D wise unless you plan on getting into rendering, I wouldn't bother. It's unlikely you'll get too much work out of it. Most of the visualisations are architectural based, and so you'd be expected to read a CAD file (AutoCAD), which tends to work best with 3DS Max (That one programme is a skill in of itself), also all windows based. Cinema 4D works for Macs, and I've seen an increase in the use of this, however most companies will have deployed Windows machines to use AutoCAD and so the uptake isn't great, again for freelance though it's good (Vectorworks is good for Mac too). Obviously there's other '3D' design roles, such as animations, which tend to work more with video production, or games.
Anyway, if you're studying 2D Design then focus on Illustrator/PhotoShop/InDesign, and I would suggest learning the basics of Web Design (Learn to build from scratch, but a lot of companies want Dreamweaver/WordPress knowledge). You could dabble in 3D if you want, AutoDesk do great student licenses, but as I said it's extremely complicated with a steep learning curve, and I would imagine if you enjoyed 3D design you would have picked that over 2D!
Enjoy your course