Need Advice on Creating Entrance Portfolio

I am applying to FIT accessories design 2-year associate degree program and need some tips on how to create my portfolio. Looking to pursue shoe design career. I have not previously taken drawing courses but have made a few sketches of designs. Need help in devising my course of action. Read a thread response (from Yo) that advised to cut up old shoes - I love this idea and would like to create new designs using this method, but not sure if this is considered acceptable.

A bit overwhelmed and need some guidance from experienced individuals.

Thanks.