Many companies are looking for interns who can build things and get things done in practice. Hopefully, this should align with your interests so that the answer becomes simple — start developing things!
It is important to let people know you can create new things. You could be world’s best python master but no one would know if you never do anything with it. Therefore, don’t be afraid to show people what you can do. At the very least you’ll be able to demonstrate that you have what it takes to get things done.
Don’t miss your computer science classes, but don’t count on your grade to land you to an internship. Never before has what people have built mattered more than their grades. You need to show that you are a computer scientists who can make good product decisions, who is sensitive to the needs of the end user, and who has a track record of finishing projects.