To any undergraduate student that wants to pursue graduate school, my best advice would be to study hard, celebrate your academic victories, and don't get caught up on your failures. Everybody has a story of a course they wish they did better in, or a midterm/exam that was an unexpected curveball, but as long as you learn from your past and keep pushing forward, things will work out for the better.
Graduate school is an incredibly enriching experience. Focusing on what interests you most brings a whole new level of richness to your learning. In addition to your courses there are also opportunities to refine presenting skills, attend conferences, and work as a teaching assistant for undergraduate courses which blends education and work experience together to prepare you for a fulfilling career.
My advice for prospective grad students is to reach out to people. When I was looking at the CDE program, I reached out to a couple of graduated students in different fields to talk about their experience in the program. This information was very valuable and helped me to make a confident choice. If you have any questions about the program or my experience please feel welcome to reach out.
My advice to any prospective grad student is to not rush into graduate school without some self-reflection about your passions, what you love doing and what you would like to study. This is because grad school can be a challenging place but also incredibly rewarding as it teaches you how to read critically, learn systemically, and think deeply. As such, I invite potential students to engage in some introspection and self-reflection about your motivations, desires, and commitments as this is a weird (but wonderful) experience distinctive from both undergrad and from other jobs so its important to not rush into anything without thinking.
Identify your passion and reason(s) for wanting to become a graduate student. Write them down, type it up, post it large and visibly on your desk or wherever you do your work so that it remains a constant reminder of why you are doing what you are doing and will motivate you through the hard times that every graduate student has and does go through, so that you can always see the light at the end of the tunnel.