Hello Sade! I think there are lots of great steps that you can take to set yourself up for success in this arena.
As an HR Manager, a large part of your role will be to bridge the "people" side of your company with the "business" side of your company. So, on the academic side of things, I would recommend coursework that relates to psychology (courses like human development and small group dynamics come to mind) and business (maybe international business models or how to read a P&L). Being able to highlight these types of courses on your resume will certainly be to your advantage.
Outside of the classroom, there are a number of things you can do to set yourself up for success as well. I would recommend being closely involved in at least one student organization. Ideally, you could hold a position that focuses either on the business side of the organization (think, Treasurer) or on the people side (think, Historian or Membership Admin).
While in college, I personally held the position of New Member Educator in my sorority, and having "onboarded" new members into our organization was part of what helped me get my first job in human resources - a coordinator position where 50% of my role was onboarding new employees. I would recommend this route to anyone if that sounds interesting to you.