Future nursing student writing a coverletter for a non-clinical/ clinical support job because I want to get experience working in a hospital setting. What do I say?

For context, ive never written a cover letter before, so I am quite clueless at the moment. I will be taking a course to become a Health Care Aide in 2020, then going to nursing school once I have saved up enough money by working as a HCA. In the meantime, I would love to work in a hospital setting as a dietary aide/housekeeper/anything else I dont need a degree or certificate to do, but my resume does not have any clinical experience on it, so I thought a cover letter may be the best way to convey my thoughts and goals. How do I go about writing this? What should I enclude or exclude? Any general coverletter writing tips?

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