Consider teaching Biology - if Bio is what interests you most, you might be a good teacher, and able to work with students who, like you, sometimes struggle with academics. Don't let anyone else tell you what to do, follow your heart, okay, kiddo? I think the Internship sounds like a good opportunity, and will give you more of an idea what those jobs entail. And if you add in some education classes, maybe as a minor, that ought to hush the whiners who think you'll never get a job. Good teachers, especially in the realm of science, are always needed.