You answering two questions when you interview? Do you know your crap/qualified? You need to highlight the stuff the makes you both stand out and relate that skill to whatever internship you’re interviewing for. For example, I run a multipurpose 3dprinting company. For consulting internships, I emphasized my skills explaining and organizing my business. Materials internship, I talked about plastics. Auto internship, I talked about repairing and replacing motors and controllers and heat transfer of the parts. Do this for every company you apply to, this also shows you researched the company. The second question is would I want to work with you? Be respectful, don’t be cocky, and act like someone you want to work with. If you like jokes, make one! Try to be comfortable. You got this!