Internships as a High School Student?

Hi, everyone. I’m wondering if anyone has any sort of tips on how to obtain an internship involving either politics or law. As a not yet legal high school student, I’ve found it difficult to even apply for internship programs because of the age line. Anyhow, I was just wondering if anyone could offer advice on working or volunteering for congressional campaigns, local government, or small law firms. Thanks so much!