First, 19 is still young. If you have some real-world experience and have either completed, or are in the process of getting an education/training to back it up, you can certainly position yourself for a paid internship. I was able to hold down a great internship in design with just some photoshop work I did when I was 16. It's definitely about your passion and true potential. Just show that you have a roadmap to bring value to the company, while being able to learn from them as well, and you'll do fine.