Building a Strong Resume For a Freshman In College

For the record, I have zero work experience. I will be entering college with a declared major as Computer Science. I would like to get a paid internship in the Summer of 2018, but at the moment I have nothing to show for. I am fluent in Python, however - but that's about it. Is there anything you guys would recommend I do throughout the course of this school year that would be worth while putting in my resume. Thanks!