What are some good places to find an internship?

I've used Linkedin, Indeed. and other websites to try and find an internship. However, I'm finding it incredibly troublesome, as those offering internships aren't offering opportunities I qualify for. The internships either require I be a college student (which I'm not) or that I work full-time (which I can't do). Are there any resources that can help me find internships and other opportunities geared toward high schoolers?

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