Here is some information that might help. The majority of college graduates are successfully employed in fields unrelated to their major. Coursework in your major is the leading factor leading to job search success. But to completely ignore the importance of grades would be a mistake. Your first job determines your future.
Most people change jobs and even careers multiple times over the course of their lives.
Fresh starts in entirely new career fields are becoming the norm, not the exception. Suggested Student Career Timeline Freshman year - explore interests and abilities by taking a variety of classes. Get involved in a club or organization. Start a resume. Sophomore year - aim for leadership roles in organizations.