I recommend doing a few side projects (1 per weekend or so) that demonstrate your current abilities. Make them in a variety of contexts, sizes, product categories, and aesthetic languages than each other and than your current NDA project. Then maybe have a page with the company logo and a brief ‘Confidential Project’ Title/SubTitle.
I was in a similar position a few years ago, so I designed a baby toy and a pencil sharpener to complement my best school work and the 1-2 internship projects that I could show and it helped me get my foot in the door at a place that later hired me full time.