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There are several things you could do to help others that doesn't involve you becoming a Nurse or Teacher. My field is in Human Resources (HR) and this is a great field to help others. HR has several different areas within it that you could do, such as Benefits Administration, Employee Relations and Talent Acquisition/Recruitment. For example, I work in Talent Acquisition/Recruitment and this area within HR helps others get jobs and careers. It just depends on what you really want to do and feel that you will enjoy doing for years to come.